She is going to get married, and her hymen was broken without her committing any immoral action
Question

                I came from a religiously-committed family and I am also religiously-committed, but now I am living in a state of fear because I am soon to get married to a young man who is also respectable. The reason is that I think my hymen may have been broken – without committing any immoral action, Allaah forbid. Should I tell him about that (although it will be difficult for me) or should I leave it until the wedding night and not tell him? I do not know what to do, please advise me. May Allaah reward you with good.
Praise be to Allah.So long as 
    you are chaste and have not committed any immoral action – praise be to 
    Allaah – then you do not have to tell him, and you should not worry about 
    that. The hymen may be broken due to jumping, insertion of fingers, heavy 
    menses, lengthy spinsterhood and other reasons that the fuqaha’ have 
    mentioned. 
See: 
    al-Mabsoot (5/8), Kashshaaf al-Qinaa’ (5/47) and al-Fataawa 
    al-Kubra (3/88) 
The husband 
    should think well of his wife if he finds out that she is not a virgin. As 
    we have mentioned, virginity may be lost due to causes other than immoral 
    actions. If we assume that he asks you, you can answer him in a way that 
    will ward off doubt from his mind. Rest assured that Allaah will support His 
    believing slave and help him. See also question no.
    40278. 
The Standing 
    Committee for Issuing Fatwas was asked: A Muslim woman had an accident when 
    she was small in which her hymen was broken. She has got married but the 
    marriage has not yet been consummated. In another case, a woman suffered the 
    same accident, and now religiously-committed brothers are coming to propose 
    marriage to her. They are both confused about their situation. Which is 
    better – should the married woman tell her husband before consummation of 
    the marriage or should she keep quiet? And should the one who is not married 
    yet go ahead with it, lest it become known and people think badly of her? 
    This happened when she was small and was not yet accountable. Or is this 
    regarded as deceit and cheating? Should she tell those who come to propose 
    or not, for the sake of getting married?  
They 
    replied: there is no shar’i reason why she should not conceal it, then if he 
    asks her after consummation of the marriage, she can tell him the truth. End 
    quote from Fataawa al-Lajnah al-Daa’imah (19/5) 
We ask 
    Allaah to help you and guide you. 
And Allaah knows 
    best.