She did Hajj before she became religiously committed – should she repeat her Hajj?
Question

                I did the obligatory Hajj a few years before I became religiously committed, and before I started to wear hijab. Praise be to Allaah, now I have started to adhere to Islam and I wear hijab and niqaab. Do I have to do the obligatory Hajj again or not?.
Praise be to Allah.Firstly: 
We praise 
    Allaah for having guided you to obey Him and seek His pleasure, and we ask 
    Him to make you steadfast until you meet Him. 
Secondly: 
The Hajj 
    that you did before is sufficient and counts as the obligatory Hajj, and you 
    do not have to repeat it, even though you were falling short in your 
    religious commitment and wearing hijab, unless at that time you also 
    neglected the prayer and persisted in missing prayers even during Hajj. In 
    that case your Hajj does not count because not praying constitutes kufr, and 
    Hajj is not valid if there is kufr. 
Shaykh Ibn 
    ‘Uthaymeen (may Allaah have mercy on him) was asked: If a person who does 
    not pray or fast does Hajj, what is the ruling on his Hajj when he is in 
    that state? 
He replied: 
    Not praying is kufr that puts a person beyond the pale of Islam and means 
    that he is doomed to eternity in Hell, as is indicated in the Qur’aan and 
    Sunnah and the words of the righteous salaf (may Allaah have mercy on them). 
    Based on that, it is not permissible for this man who does not pray or fast 
    to enter Makkah, because Allaah says (interpretation of the meaning): 
“Verily, 
    the Mushrikoon (polytheists, pagans, idolaters, disbelievers in the Oneness 
    of Allaah, and in the Message of Muhammad) are Najasun (impure). So let them 
    not come near Al‑Masjid Al-Haraam (at Makkah) after this year”

    [al-Tawbah 9:28]
The Hajj 
    that he did when he did not pray is not valid and not acceptable, because it 
    was done by a kaafir, and acts of worship done by a kaafir are not valid, 
    because Allaah says (interpretation of the meaning): 
“And 
    nothing prevents their contributions from being accepted from them except 
    that they disbelieved in Allaah and in His Messenger (Muhammad), and that 
    they came not to As-Salaah (the prayer) except in a lazy state, and that 
    they offer not contributions but unwillingly”

    [al-Tawbah 9:54]
End quote 
    from Majmoo’ Fataawa Ibn ‘Uthaymeen (21/45). 
And Allaah 
    knows best.