I don't know the stats on this information so I'd appreciate some info.

I want to know the liklihood of a pregnancy given the following situation:

I am a 20 year old girl and my last period started 17 days ago and late last night (or early this morning) I had unprotected sex. He pulled out and never actually ejaculated. I can't think of any more relavent information except to say that (as weird as this is to type) he had gone to the bathroom before doing the deed.. . I recall reading something somewhere about this clearing "left over" sperm from the urethra.

And just in response to anyone who suggests being more careful from here on out: believe me when I say I agree and I am beyond mad at myself for letting this happen to me this one time.

Pulling out is not a true birth control method. I don't know the exact stats but it's high enough that if I were you, I'd be looking into getting the plan be pill now.