Letrezole Vs Clomid thoughts?

My Dr started me off on clomid for our first IUI and I produced 7 eggs about 3-4 were mature enough at time of IUI (you would think odds were good) Sperm was good as well anyways didn’t work. We were going to do a second IUI right after but clomid left me with cysts- anyways that next cycle I got pregnant on my own but ended up having another MMC at 11 weeks.

We are thinking about trying another IUI but I would like to just try a cycle with medicine (no trigger shot and iui) first. I want to ask my Dr about prescribing me Letrozole - he said this typically doesn’t produce cysts- any thoughts? Did you have better luck with either one?