All week I've been, tired, my nipples are sore, been feeling sick as if I have to throw up but I don't, just don't feel good and I'm having cramp like pains in my stomach,,,, and a sour taste in my mouth as if I've ate something bad. I've taken a pregnancy test two weeks ago that I got from dollar tree and it said negative and I have been having unprotected sex since. What may this be bc my pregnancies test is megabits my period hasn't been on since the early or middl April and I'm just confused? Please help me?