Don't be embarrassed there are tons of helpful people on here that wont judge you!
I'm sorry to hear about the rape it must have been a horrible experience. I think theres a forum on here to talk about that to!
He probably gave you some type of infection, bacterial vaginosis, yeast infection, or he could have given you a nasty std. The only way your going to get rid of bv and std's is going to the doctor to put you on antibiotics. You might have to go back a few times because they can be pretty tough to get rid of sometimes!