lol you made me smile =) I also agree with mel....
Your completly paranoid- and I wouldn't be too worried. A women only has a like, 20 % chance of even becoming preggers at ALL every month-and that's with no birth control and actually trying to have a baby.
Maybe you need to reconsider your "dating" habits. Now- when you were dry humping- were you naked? How do you "accidentaly" penetrate sombody?
Please save humanity- and buy some condoms!
I can't really say... But they do say you can get prego just of pre-***... But you never know. It all depends on the women too. Me and my fiance have been having unprotected sex for a while now. And been trying to be blessed with baby.. I have never been on any bc before (besides in sept. i started to just to regulate my hormone to even me out) but I never got prego before and like I said we didn't have anything... So it all varies. For your sake though I highly doubt it. But just be prepared. Good luck.