I haven't had my period since jan. I crave really weird foods, I'm very, very sensitive to smell, my stomach will get tight and then go back to normal. I have took 1 home pregnancy test and it was negative. I still feel that I am pregnant, but I'm not sure...

You will need to go to the doctor and have him do a better pregnancy test. Also when did you last do a pregnancy test. While rare, some women do not show positive on a home test.