Help- Anyone else experience this?

Cristi

Hi. I am TTC since March with IUI. I had a perfect March and completed one IUI- it didn’t work. I used Letrozole. Since then. It’s been down hill. I keep experiencing rouge follicles that show up on my base line. I always seem to have a 16mm. Then I have to force an ovulation. Get a clear baseline and start again. I am getting no clear answers as to why this is happening. Anyone?