Since I don't have the heavy bleeding, my situation is slightly different from yours, but I am having a similar problem making a decision.
I had been on different birth control pills for the last 6 or 7 years, and kept having the breakthrough bleeding, regular almost like a 2nd period. 3 years ago, my lining was 8 mm but it hasn't been checked lately. I kept trying more different pills, loestrin 24 helped some, but then my insurance stopped covering it so I tried yaz. The nurse practitioner recommended Mirena because she uses it herself, but I didn't want to try it since the hormones are similar to the pills that didn't work. Another thing I ought to do is try to lose weight and exercise more and see if that has any effect. I had pain and cramps, which they were able to identify as coming from the left ovary during the ultrasound. I have some small fibroids now that they didn't find 3 years ago. Plus I'm 38, and the pills are supposed to be riskier as you get closer to 40. I wanted to see what happened if I went off the pills. My husband has not had a vasectomy, so the gynecologist wanted me to have an ablation or tubes tied before I tried going off the pill completely.
This was where I was having similar trouble making a decision. Would I need a D&C, ablation, and/or fibroids removed? Did I really need permanent birth control and could I talk my husband into getting a vasectomy if it meant I avoided surgery? Would the breakthrough bleeding stop once I was off the pill, or would I have problems with heavy bleeding?
I chose to go off the pills, but delay any surgeries or permanent birth control. It's only been 3 months, but my cycle is normal again, and only slightly heavier than before. The only wierd thing is that it was 2 weeks off from when it would have been with the pills. I will still have to decide what to do next, but I have put off the bigger decisions for now.