Confusd and stuck waiting

So AF was due Sunday, and nothing yet. I have taken several test, with negative results. I am nauseous, tired, and SO emotional. My dog is acting overly protective and want to rest his head on my tummy. And i swear my boobs are bigger by like half.

I had my IUD removed in March, did one month of birth control in to help regulate my cycle after 9 years of nothing, and have been regular since.

Im just so confused. If im not prego then wtf is going on?!?!?