OK! For the past weeks I've been feeling really tired, my breast feel heavier,my period was 2 weeks late (but im not sure if this is because I was on birth control for a month), I have gotten lower back pain a few times, I am hungry most of the time, I get irritated pretty fast, and for the past few days I've had a very light brown discharge. I took a pregnancy test but it came back negative and 2 days later I got some bleeding and it lasted 4 days and I didnt get any pain... could i be pregnant????