Pregnant or birth control withdrawals?

I went off birth control on may 12 because my husband and I decided to TTC. I had AF may 16-19. It was on the lighter side but that wasn't a surprise to me. We BD may 21,22,25,26. For the last week I have been very nauseous and tired. My nipples hurt so bad and I occasionally get very dizzy and light headed. If I don't have even a little bit of something In My stomach I get nauseous and need to eat a piece of bread and I'm good. I have taken a few hpt and I know it is way early but I couldn't help myself and got BFN. I don't know if I'm pregnant or what I have read about withdrawals of going off of birth control. I want to get pregnant so bad and I don't want to be disappointed. But I want to know what any of you think? Thanks!