My last period was on nov 20 and I have not since then... I did have sex on my ovulation day.I did have nausea and know I have cramps in my stomach and it hurts to lay on my stomach. But I do not have sensitive boobs. What do you think it could be I'm I pregnant??

Don't know.

When is your next period due?

Have you taken a pregnancy test?

The symptoms you describe could be either pregnancy or premenstruation. There's no way for me to even give you a guess and I'm in the women's health profession.

Anytime you have sex you have a chance of getting pregnant. Go take a test.
Sometimes pregnancy effects people different. For example, I got sick for about 3 days straight everyday around 1 oclock - 3 oclock. I thought I had a stomach virus because I had my period the month before. I did now have tender breast, cramps, or anything else. However, My cousin is due around the same time as me and she gets light headed, tender breast, and wants to sleep all the time. :) only for sure way is to take a test.