Ive been having unprotected sex with my boyfriend for a little over 2 months now(stupid I know), last month we had sex while I was on my period before and after my period ... I cant remember when I did get my period so Im not sure ..... when to know if I missed it or not..... but the period I got last month was heavy for a day.. 2 at the most!!! then just light bleeding and weird discharge .... I took a cheap! pregnancy test a couple weeks later and it was NEG... but now randomly my back is killing me my stomach feels as if its got like air in it or something... and i get odd little sharpish pains in my right or left sides of my lower stomach and usually slight pain in my breasts maybe a few times nothing that lasts or anything ... and I feel very very tired and dizzy... and a bit nauseous but no vommiting... and food... I just dont wanna eat because food just makes me wanna gag :S is this in my head ?? or could I be pregnant :o please help me !! ( im only 15 ) I know Im to young for this kinda stuff but Id just reall like someones opinion :(