Low AMH and endometriosis

I have endometriosis and I had two cysts removed from each of my ovaries 7 years ago. Had been taking birth control until a year ago when we started ttc. It's been a little over a year with no luck so we finally went to a fertility doc. All of my tests so far have been normal: fsh, progesterone, estradiol, HSG. But I just got back test results from my AMH showing really low levels: 0.39.  Doc says it's prob due to endo because they shouldn't be so low since I'm only 31 and still have both ovaries in tact. She wants me to do letrozole and <a href="https://glowing.com/glow-fertility-program">iui</a> next cycle. Anyone else out there with low AMH levels and endo? She says I can still have kids but I'm just having a really hard time staying positive with such grim odds. Anyone with low AMH levels have success conceiving with letrozole and <a href="https://glowing.com/glow-fertility-program">iui</a>?