I've been on the pill for a little over 4 years now. A couple weeks ago, my boyfriend finished inside me on two different days. I am supposed to start my period today (which hasn't come yet, but it usually comes in the evening). About 4 days ago, I had some brown spotting but only once. Last night I started to have stomach pain and a little nausea, which got even worse once my anxiety kicked in. I've taken 3 pregnancy tests over the last 4 days and they've all come back as negative. I have some white thick discharge, but I'm still having a lot of anxiety about the possibility of being pregnant. I skip over my placebo pills every other month so I don't have to have my period, so my last period was Nov. 28th. I don't have sore breasts, food aversions, or anything other than the brown spotting four days ago (6 days after I had sex with my bf) and some nausea last night. I'm really scared. Any help?