Did Letrozole work for you? How many rounds did you have to do?

My new GYN put me on Letrozole this month, 2.5mg. We’ve been TTC for 31 cycles and I have unexplained infertility. I had a laparoscopy in May and since then my cycles went from 28/29 days to 25 days. This cycle on the medicine i might be back to 28/29. Currently CD 25 and 10 DPO.