I had a period in April that came almost two weeks early and was very heavy, then had unprotected sex with my bf right after it ended. I then had an abnormally light period in May that came a week early. I have not had a period since, and recently had three days of occasion brown spotting. But it was very little. Took 4 pregnancy tests last month(before my missed period, during when I would've had it, and the week after) they all came up negative. I've been feeling tired and bloated a lot. What could be going on with me? I'm starting to worry, but I'm 20 and don't have insurance right now because of a company switch, so I can't go to the doctors until I'm covered again. Help?