What's wrong with me

So here's the sitch I've had really sore nipples for a week to the point I can't wear a bra. My period is two weeks late and I feel super nauseous and things that I love to eat all of a sudden make me want to puke. I'm really bloated and gaining weight along with bad headaches (which aren't normal for me anymore) I've also had to pee like every 20 minutes but my test came back negative am I testing to early or something?