1st IUI, unexplained fertility

I have been off birth control for 2 years, thought getting pregnant would just happen, but never did. Went to RE to start getting worked up in Oct. 2018. All good on both ends. Continued to try the old fashioned way with no luck. Started to take letrozole with trigger and timed intercourse in April and May with no luck. 1st round I had 2 follicles, progesterone 29. 2nd round 3 follicles, progesterone 20. Really thought last month was going to be it, but negative. Currently on 3rd round, ultrasound scheduled for Friday and hoping to do 1st <a href="https://glowing.com/glow-fertility-program">IUI</a> on Saturday.

I never thought I would be going through this. It’s been so hard, especially watching so many of my loved ones get pregnant and have babies. Any advice, support, or success stories would be appreciated. Feeling really sad that we haven’t been able to start the family that I always wanted.