Originally posted by animal56
FYI - The semen is just a vessel for the sperm to help it get through any obstacles or antibodies in your body.
Chances are, that if the sperm wants to get through, it would have "infected" before you "squeezed".
If you had an orgasm, the chances of conception are even higher. The female orgasm is actually the cervix extending and dipping into the pool of sperm inside your vagina (if I have my anatomy right). Your best bet is to get to the doctor and take a morning after pill if you are truly worried (maybe over-the-counter in the US?). It'll cost you $$ and lay you up in illness for a few days (puke and all), but it's your best bet in these next few hours. DO NOT WAIT UNTIL YOUR PERIOD IF YOU ARE NOT INTENDING TO CARRY A FETUS! You'll be walking into abortion/pregnancy territory then.
Whatever happens MG, be calm. As a young woman, I'm sure this won't be the last time you'll have a "scare". As well, I think the intentions of the people in this post are good, but maybe a bit misdirected and critical (father figurely?). What's done is done. Now you have to think things out, react as appropriate, and hopefully you'll learn from this, and maybe find alternative birth control methods.
I'm a 27 year old father of a 6 year old daughter, speaking from experience.