My fiancee and I had sex a month ago on December 5th, I'm 21 and he's 24. This past week or two my stomachs been feeling weird. Not nauseated or hurting, but uncomfortable. It's hard to explain and my mom doesn't seem to understand what I mean when i try to explain it to her. It comes and goes, and very few times does it make me want to vomit, but I never do. My nipple seem to be itchy too. I don't have dry skin, that I know of. I use lotion on them but it only stops the itching for a few minuets. My nipples have always been sensitive. I've also been getting headaches a bit lately. I had headaches a lot last year, but haven't had any since. The headaches started almost a week ago.
I don't know what else could be causing these things, so my question is: Could I be pregnant?