She vowed to fast seven consecutive days if she passed her exams
Question

                During my exams I vowed to fast 7 consecutive days if I pass. Allah blessed me and I passed the exams and started to fulfil my vow. I could not fast consecutive days so I fasted seven separate days. Is what I did correct or should I repeat fasting them consecutively? What should I do if I cannot fast continuous days?.
Praise be to Allah.
    If a person vows to fast for seven consecutive days, he must 
    fulfil the vow and fast these days consecutively, and it is not permissible 
    for him to fast them separately, because the Prophet  (peace and 
    blessings of Allaah be upon him) said: “Whoever vows to obey Allaah, let him 
    obey Him.” This was a vow to obey or worship Allaah. What the questioner 
    says about having started to fast these days but she was unable to fast them 
    consecutively, means that she failed to fulfil her vow. If she was prevented 
    from fasting them consecutively by some excuse, as she said, then she has 
    the choice between two things: either to start over and fast the days 
    consecutively, or to complete the remaining days, but she will have to offer 
    expiation for breaking an oath (kafaarat yameen). The expiation for breaking 
    an oath is well known; it is freeing a slave, or feeding ten poor persons, 
    giving each poor person half a saa’ of the local staple food, or clothing 
    ten poor persons, giving each one clothing that will cover him when praying. 
    She may choose one of these three things. If she cannot do any of them, then 
    she must fast for three days.