Dominant follicle regression vs ovulating?

Hey ladies:

Went in from my follicle tracking ultrasound this morning. This was my 3rd ultrasound in the past 9 days. I’m on an extended cycle after switching to 50 mg clomid after 8 days of 5 mg letrozole. I had an 11 on my initials ultrasound last Monday, Friday it grew to 14, and now today (Tuesday) it was gone. I either ovulated or it regressed?

Anyone ever experienced this? Loosing hope fast and they are talking about switching to gonadotropins 😔