She bled after having an injection for temporary contraception; what should she do?
Question

                I have a female relative who is married; she is thirty years old, has diabetes and high blood pressure and she had a stroke last year that affected her health in general. Then she had an injection that would provide contraception for three months. Before that time ended, she started to bleed, a light flow that lasted from before Ramadan until after Ramadan ended, and she continued to pray and fast. She also told me that now she has made up 16 days. What is the ruling on this injection in her case? Should she make up the prayers or the fasts, or what should she do? What is the ruling on her situation in general?.
Praise be to Allah.
    Firstly: 

    It is permissible for a woman to use means of contraception 
    on a temporary basis, to safeguard her health if she is unable to bear 
    pregnancy. 

    Shaykh Ibn Baaz (may Allah have mercy on him) said: 

    It is permissible to use temporary methods of contraception 
    for legitimate shar‘i reasons. End quote. 

    Majmoo‘ Fataawa Ibn Baaz, 9/434 

    Shaykh Saalih al-Fawzaan said: 

    If this spacing or delay of pregnancy is for health reasons 
    affecting the woman, such as if she cannot bear pregnancy and childbirth due 
    to some special reason or circumstances, such as sickness, then there is no 
    reason why she should not be given something that will prevent pregnancy 
    occurring until the situation that makes it too hard for her to get pregnant 
    and give birth changes. End quote. 

    Al-Muntaqa min Fataawa al-Fawzaan, 
    89/20 

    Secondly: 

    This woman is mustahaadah (experiencing abnormal bleeding). 
    If her previous menstrual cycle is known, then she should refrain from 
    fasting and praying during the days of her usual period, then when that time 
    ends she should do ghusl and resume fasting and praying. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was asked 
    about a woman who bleeds a lot; how should she pray and when should she 
    fast? 

    He replied: 

    In a case such as this, when a woman bleeds a lot, the ruling 
    is that she should stop praying and fasting during the days of her period 
    according to her previous cycle before this problem affected her. If her 
    period used to come at the beginning of every month for six days, for 
    example, then she should stop praying and fasting for six days at the 
    beginning of every month; when that time ends she should do ghusl and start 
    to pray and fast again. 

    How this woman and others like her should pray is as 
    follows: 

    She should wash her private part thoroughly and put a pad or 
    sanitary towel, then do wudoo’. She should do that when the time for each 
    obligatory prayer begins; she should not do that before the time begins, 
    rather she should do it after the time begins, then pray. She should also do 
    that if she wants to offer naafil prayers at times other than the obligatory 
    prayers. In that case, so as to avoid hardship, it is permissible for her to 
    put Zuhr together with ‘Asr, and Maghrib with ‘Isha’, at the time of the 
    earlier or later prayer, so that she only has to do this once for two 
    prayers in the case of Zuhr and ‘Asr, then Maghrib and ‘Isha’, and for Fajr. 
    So instead of doing it five times a day, she only has to do it three times. 
    End quote. 

    Majmoo‘ Fataawa wa Rasaa’il Ibn ‘Uthaymeen, 
    11/220 

    Thirdly: 

    You said that she used to pray and fast during the time when 
    she was bleeding. The prayers offered during the time of her usual period 
    are not valid, but she does not have to make them up, because a woman who 
    menstruates does not have to make up prayers. 

    With regard to fasting, it is not valid during the days of 
    the menstrual period and she has to make them up. She has made up sixteen 
    days; if these were the days of her period or more, then she has done what 
    is required of her and she does not have to do anything more than that. But 
    if the days of her period were longer than that, she should make up what 
    still remains.  

    And Allah knows best.