Wow, your email was short but very powerful. We're assuming you're the victim of this sexual assault, correct? What a horrific thing to experience. We're glad that you're looking for help, though, so you're definitely on the right track.
If this assault was very recent, you'll want to go to the hospital to get checked out. Oftentimes there are rape crisis centers in your area that can help you through some of this. Since we don't know where you're located, we're going to give you RAINN's info, because they can give you referrals to crisis services nearby:
RAINN - Rape, Abuse & Incest National Network
Just call them up, explain what happened, and they'll help you figure out what your next step should be. If you were assaulted awhile back and don't need to go to the hospital, you should still give RAINN a chance, because they can get you in touch with counselors. We'd definitely recommend counseling, because sexual assault can easily traumatize you. It's a very difficult thing to process and live with sometimes.
We also recommend calling the police ASAP. Even if the police don't have enough evidence to prosecute or your state has statutes of limitations and time has run out, your police report still creates a very important paper trail. If this guy hurts someone else, your report will help.
If you haven't told your parents, they'll need to know as well, just to make sure you get the treatment you deserve. Also, whoever it was that hurt you, stay the heck away from him! :( If he's someone you know and see often, avoid him. That's one of the reasons why it's so important that you call the police as soon as possible. You don't want any further contact with him.
We hope some of this has helped. If you need further advice, email us back or call us: 1-800-448-3000. We're here 24/7.