I have missed my period by 2 weeks and i just started bleeding brown nothing to bad not even enough for a pad or tampon just when i wipe. I have only had one shot of depo and i have been sexually active ever since that shot. I have been hungry all the time other than the past couple days(3) I have been extremely moody and ive had lower back pains and headaches. Ive taken how many hpt's and they all come back negative. My boyfriend and i really want a baby and we are thinking that im pregnant. Am i thinking to hard or is it really possible im pregnant?

Any help?