I'm using same birth control pills for last 2 years for heavy mensuration and retrograde mensuration and also endometriosis pain. Pills contain desogestrel (0.15 mg, ethinylestradiol (0.02 mg). I'm in 42 days back to back pill treatment. I'm seeing in all website withdraw bleeding was lighters compare to normal mensuration. But I have heavy period during withdraw pill. I need why was happening to me? September 2018 I had been laparoscopic surgery for chocolate cyst 9 cm endometriosis 3rd stage. After surgery my period not stopped it's own still now without pill. So I taking pill continuously same time every day. But still my problem doesn't cure. Still I have heavy period on withdraw bleeding. Now my problem is increased compared to last 2 years. I'm really need normal mensuration with birth control pills. Now am taking 3 pills per day with trapic mf 3 per day. But still spotting on if I sit down or walking or urine. Please I need relief from heavy period. This problem was started from my age of 12. I'm 26 years old and virgin girl.