What should I do if I think I might be pregnant but all pregnancy tests I take say I'm not? I've been gaining weight, I'm always hungry, I'm tired constantly. Everyone around me thinks I am but I've even done urine tests at the doctors in the past and they say I'm not but that was about 2 months ago. I've never had a normal period other than when I used to be on birth control but now I'm not on it. I need advise. please respond asap! %-)