Im A Teen, I Had Sex With My Boyfriend Around

Im a teen, i had sex with my boyfriend around thanksgiving and idk if ive just been parinoid but ive googled and searched about pregnancy. I know im not a doctor, but i just feel diffrent. Ive been bloated (or just got a little fat), i have that "full feeling", ive been a little sick (no throw up), yellowish creamy discharge, mood swings, higher sex drive, and sometimes have shortness in breath. I took two pregnancy tests and both came back negitive (i took them monday), i no longer feel the "full feeling" but im still concerned. Havent missed my period yet but it should be here by now..... It usually comes in 14-20th