2 bfns, Af due yesterday... But call me crazy I still think I am pregnant. Advice?

I've been having symptoms for about a week and a half now. Sore , nausea, head aches, weird twinges in my ovaries, constipated, moody as hell, and extremely vivid dreams. So yesterday evening I took a test and bfn. So today I took another with first morning pee, still bfn. I'm going to wait a few days, but has this happened to anyone and then a few days later they get a bfp?