I've been on birth control for six years, and I have never missed a period. Last month I missed my period so I stopped taking my birth control unsure if I was pregnant, and I've started bleeding a week before I usually would. It's extremely heavy and I'm extremely uncomfortable, bad cramping and back aches... I have never had such a heavy flow before. I'm worried that it's not just my period, but is it possible to miscarry this early, I'm not positive of a pregnancy this is just extremely unusual.