I was date raped. i didn't have my period for 3 months. was that normal?

No: ...But being date raped isn't normal either. You are going through a lot physically, emotionally and psychologically. Get some help to sort out all of these complicated issues. Get a physical check up. Getting date raped is very confusing and you don't want to let this confusion get in the way of treating anything physical. Get psychological help, you shouldn't go through this alone. Best wishes.