Why am I bleeding??????

So I’m on birth control and in a committed relationship with my boyfriend. We are both clean and so we have unprotected sex sometimes. Recently I’ve been what I thought was spotting but seems to be continuous and I’ve had cramps that I usually get during pms or my period...except my period is supposed to be two weeks away. I also recently moved and started college and some say that stress and a new environment can throw off your cycle. Is that happening? Is my period syncing up to my suite mates? Could I be pregnant?