I'm 20 years old and I haven't had a period in a long time. It has probably been about a year. Well, this morning I had protected sex with my boyfriend for the first time ever for me. Well, it didn't last very long (5mins) because it really hurt. Well, I know that their is probably very little chance that I am prego, but I wouldn't know because I haven't had a period in so long...What should I do?