I missed a couple days of my pills and had a lot of unprotected sex an he ejaculated inside me almost every time. I took 3 pregnancy tests and the all showed up negative. And I also started taking my my pill where I stopped and doubled up on them until I got back on track. I also have been getting sick to my stomach a lot. And when I eat it goes away for awhile, but then comes back. The stomach ache is worse at night and in the morning. Is there a possibility I could be pregnant?