I really need help

Almost two weeks since i missed my period, took two tests last week they said negative, very very very Moody one minute I'll be happy and the next second I'm screaming at someone and emotional wanna cry all the time and i don't cry ever. Tired during the day, nausea a little here and there, eating like crazy but no cravings and having to pee Alot. I don't know what to do and need advice.