am i pregnant?


i’m on birth control and i had sex jan 19. around the time i had started on a new pack since i missed a few days and it was my 6 day of the first week and i’ve always heard yo not protected until a full 7 days and i’ve been feeling a little sick in the morning but i don’t have any other symptoms like tender brest or nipples or stomach pain but i’ve been having little bit of lower back pains could i be pregnant?