Hi.. Before I could continue, let me put it across to you that a case of rape is a medicolegal issue and a treatment can be possible only after booking one.. The pain and the cramps could be as a result of infection or pregnancy.. Besides you may have to also look for presence of other sexually transmitted infection.. Though it is just an opinion, in the best interest of you, it is better you do all this.. Since you are still young and family support is essential not only now, in the future to help you in coming out of the mental agony, it would be better if your family also knows about the incident.. I hope you take a bold and good decision...