She dreams of death and is afraid of it
Question

Often I remember death and I feel very afraid, I dream that I have died, and I wake up very scared. May Allaah reward you with good.
Praise be to Allah.Fear of death is a feeling that affects most people. Allah has created man in such a way that he loves life and fears the unknown, and He has made death part of the world of the unseen which cannot be fully understood except by the one who enters it. When a person thinks of it, he cannot help but feel feelings of loneliness and fear or anxiety about that unknown future. 
This is the natural explanation for man's fear of death in general. 
But the believer who submits to the will and decree of Allah, and in whose heart love of Allah is instilled and who thinks positively of Allah realises that by his death he is returning to a generous Lord and a merciful God, Who will reward him for good deeds with good things and Who will pardon his bad deeds by His mercy and forgiveness. That is only for the believer who puts his trust in Allah and whose heart is humble before Him, the Accepter of repentance. Allah says (interpretation of the meaning):
“No doubt! Verily, the Awliya’ [close friends] of Allah, no fear shall come upon them nor shall they grieve. 63. Those who believed, and used to fear Allah much (by abstaining from evil deeds and sins and by doing righteous deeds). 64. For them are glad tidings, in the life of the present world, and in the Hereafter. No change can there be in the Words of Allah. This is indeed the supreme success”
[Yoonus 10:62-64]
Al-Haafiz Ibn Katheer (may Allah have mercy on him) said:
Here Allah is telling us that His close friends are those who believe and are pious, as their Lord describes them. So everyone who is pious is a friend of Allah. “No fear shall come upon them” means with regard to what they encounter of the terrors of the resurrection. “Nor shall they grieve” means for what they have left behind them in this world. End quote. 
Tafseer al-Qur’aan al-‘Azeem, 4/278 
This is how you should be. 
We should all strive to be friends of Allah, so that we may obtain His love and pleasure, and so that His love will be the most beautiful thing in our hearts. Then death will become no more than moving to be under the care of the Most Generous, Most Merciful, may He be glorified, and liberation from the limitations and bonds of this world to the expanse and pleasures of the Hereafter. 
It was narrated from Abu Qataadah ibn Rib’i that he used to narrate that a funeral passed by the Messenger of Allah (blessings and peace of Allah be upon him) and he said: “One who has found relief and one from whom relief has been found.” They said: O Messenger of Allah, who are the one who has found relief and the one from whom relief has been found? He said: “The believing person has found relief from the troubles of this world, and the people, the land, the trees and the animals have found relief from the evil person.”
Narrated by al-Bukhaari (6512) and Muslim (950). 
It was narrated from ‘Ubaadah ibn al-Saamit that the Prophet of Allah said: “Whoever loves to meet Allah, Allah loves to meet him, and whoever hates to meet Allah, Allah hates to meet him.”
‘Aa’ishah or one of his wives said: We hate death. He said: “It is not like that. When the believer is dying, he is given the glad tidings of the pleasure and honour of Allah, and nothing is dearer to him than that which is ahead of him, and he loves to meet Allah and Allah loves to meet him. But when the disbeliever is dying, he is given tidings of the punishment and wrath of Allah, and nothing is more hated to him than what is ahead of him, and he hates to meet Allah and Allah hates to meet him.”
Narrated by al-Bukhaari (6507) and Muslim (2683). 
Al-Qurtubi (may Allah have mercy on him) said:
This dislike of death is a natural dislike which stems from a feeling of aversion, which is difficult to bear. Undoubtedly it exists in everyone, except the one who Allah blesses with love for Him and he realized the beauty of being close to Him. That person’s love for Allah overwhelms him and he will say when it is his time to depart this world, addressing death and its agonies, as Mu’aadh (may Allah be pleased with him) said: A beloved one has come at a time most needed, and the one who has any regrets today will never prosper, so take my soul as You will, for by You, my hearts loves You. 
al-Mufhim, 2/644 
If this meaning is established in your heart and soul, and you have done righteous deeds in preparation for the day of departure from this transient life, death will not harm you if Allah wills, and your fear of it will be no more than a reason to make you do good and turn to Allah, not a reason for doom, anxiety, panic or frustration. 
Shaykh Ibn Baaz (may Allah have mercy on him) was asked the following question:
Should the believer not be afraid of death? If that happens, does that mean that he does not want to meet Allah? 
He replied:
Believing men and women must fear Allah and put their hope in Him, because Allah says in His Holy Book (interpretation of the meaning): 
“so fear them not, but fear Me, if you are (true) believers”
[Aal ‘Imraan 3:175] 
“Therefore fear not men but fear Me”
[al-Maa’idah 5:44] 
“and fear none but Me”
[al-Baqarah 2: 40] 
“Verily, those who have believed, and those who have emigrated (for Allah’s religion) and have striven hard in the way of Allah, all these hope for Allah’s Mercy”
[al-Baqarah 2:218] 
“So whoever hopes for the Meetingwith his Lord, let him work righteousness and associate none as a partner in the worship of his Lord”
[al-Kahf 18:110]
There are many similar verses. 
It is not permissible for the believer, male or female, to despair of the mercy of Allah or feel secure against the plan of Allah. Allah says (interpretation of the meaning): 
“Say: “O ‘Ibaadi (My slaves) who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allah, verily, Allah forgives all sins. Truly, He is Oft‑Forgiving, Most Merciful”
[al-Zumar 39:53] 
“and never give up hope of Allah’s Mercy. Certainly no one despairs of Allah’s Mercy, except the people who disbelieve”
[Yoosuf 12:87] 
“Did they then feel secure against the Plan of Allah? None feels secure from the Plan of Allah except the people who are the losers”
[al-A’raaf 7:99]
All the Muslims, both male and female, must prepare for death and beware of being heedless, because of the verses quoted above and because of what is narrated from the Prophet (blessings and peace of Allah be upon him) who said: “ Frequently remember the destroyer of pleasures – death.” 
and because being heedless about it and not preparing for it are among the causes of a bad end. It is proven that ‘Aa’ishah (may Allah be pleased with her) said: The Messenger of Allah (blessings and peace of Allah upon him) said: “Whoever loves to meet Allah, Allah loves to meet him, and whoever hates to meet Allah, Allah hates to meet him.” I said: O Prophet of Allah, do you mean hating death, for all of us hate death? He said: “It is not like that, but the believer, when he is given glad tidings of Allah's mercy, pleasure and Paradise, loves to meet Allah and Allah loves to meet him. But the disbeliever, when he is given tidings of Allah’s punishment and wrath, hates to meet Allah and Allah hates to meet him.” Agreed upon. 
This hadeeth indicates that there is nothing wrong with disliking or fearing death, and that does not indicate that a person does not want to meet Allah, because when the believer dislikes death or fears its approach, he wants to do more acts of obedience to Allah and do more to prepare to meet Him. Similarly when the believing woman fears death and does not want it to come to her, she is only doing that in the hope that she can do more acts of obedience and prepare to meet her Lord. End quote. 
Majmoo’ Fatawa Ibn Baz, 6/313-314 
And Allah knows best.