I'm surprised they are happy with the pill given your presumed absorption problems. A method that prevents ovulation eg the depot would be ideal and will make endometriosis better.
Ive used the pill for 12 years to try and limit periods, but Ive always bled through it anyway. My gyn is hesitant about using any other hormonal birth control because of how rapidly the endometriosis grows back after being removed. They didnt want to use any IUDs because of level of cramping I already get. They said at this point my options are to either keep taking the pill and hope it helps or get pregnant and hope that helps.Ive been on over 20 medications for a year to try and help my symptoms, but I see no improvement from any of them whatsoever except sometimes the dissolving zofran helps my nausea. I dont know if this is another sign of an absorption issue.