I had sex with my boyfriend on Sunday and Monday 2 days later I started my period but my period wasn't supposed to come until Friday or Saturday. Idk if I had other pregnancy symptoms cause my boobs are big so they always sore because I run track, my back always hurt because of my boobs, I'm sick right now but everybody around me is sick to so idk if its symptoms or not. Could I be pregnant or is it to early to know