2nd FET Failed

We found out today that our 2nd FET failed. It was our 2nd and last embryo from our first IVF. I have a lower AMH for my age and had a uterine polyp removed in Dec. 2017. Our first FET failed in Dec. 2018. After that we did a hysteroscopy and laparoscopy. They discovered mild-moderate endometriosis and excised all of it. We also did an ERA in March that showed I was pre receptive and needed an additional day of meds. I really thought we had figured out what was going on and that this transfer would work. I'm so devastating by the failure of this cycle. I don't know how to keep going forward or what to do next. Anyone make it through similar experiences?