Ive been on birth control for about 2 years now and i recently changed to lyza due to high blood pressure. I missed a pill once because i didnt have the pack with me that day. My boyfriend and i had sex and he had some precum on his area. And he came outside of me, nearly directly on my vag. I tried to wipe down my vag area. Its been a few months now and I'm gaining weight. Also super moody and have weird cramps and feelings in my lower abdomen. Could i be pregnant?