No follicles yet?? Advice needed

Caitlin
Today was dya 10. I had my ultrasound and i didn't have any follicles developing yet. This is the second round of fermera 2.5 for 5 days. Last month I had 3 10mm on dya 10 and this time nothing yet. Anyone else have this and then have them develop later? Or am i out?
I believe I am a slow responder. Didn't do trigger until day 19 last month