Two, three weeks ago, my girlfriend and I had unprotected sex for the first time. It wasn't much; we only went at it about 5 minutes before I decided to stop. Afterwards, she used her hand until I came on her body (about 10 minutes later). And two days later, she got her period.
I'm assuming that she can't be pregant, but she's somewhat worried, as it is the first time she's ever had unprotected sex. It does seem a bit ridiculous, having to worry about pregnancy when I didn't even cum in her; but I would feel better if any of you had words of reassurance...