If you're this one, though ( [Link](Mouse over link to see full location) ), then simply going by the fact that he was inside you and neither of you was using birth control, yes, it's definitely possible. If you're one of the other two girls - the one in the hot tub or the one who dry-humped - then the odds are virtually zero.
I'll assume you're the one who's most at risk.
Try not to panic. First, the pains you described may not mean anything - the other two girls had pains too, and they're almost certainly imaginary. There are other physical signs of pregnancy, of coure, but since I don't know how long it has been since the event, I don't know what signs you might reasonably look for.
But you need to know. If you're within 72 hours and you know you don't want the baby, RUSH to get the morning-after pill.
There are home pregnancy tests that are cheap and can give you results quite early in the pregnancy.
And talk to your OB/GYN as soon as possible. She can give you answers that no one else can - certainly no one here!
Just to repeat, while it's certainly POSSIBLE that you're pregnant, you also might not be. Find out, so you can decide what to do next. It's better to KNOW than to stay up all night worrying.
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