i have had a fair bit of bleeding while on the pill, i would bleed mid month, early, not when i was meant to, heavy, light you name it. I often thought it was my "natural Cycle" fighting the chemical of the pill cycle IYKWIM, and i was also told that it could be that the pill i was on was not strong enough and not working for me. (could be why i have fallen pregnant while on the pill too) Try these other pills for now, and see how you go. You may need a stronger one!! Good Luck!!