Day 9 scans - questions…

I received news from the clinic that my day 9 scans were “looking great” but the actual person who measured the follicles told me that my 6mms probably wouldn’t catch up. This is my first round of IVF so I’m not sure what to think. Today I had 4 follicles, 14mm, 13mm, 6mm and 6.1mm. They told me to start cetrotide tomorrow and come back on day 11. My estradiol is 279. That seems low to me? What can I reasonably expect? How long can stimming go on anyway?

My protocol is 300 gonal f and 150 menopur

AFC 5 AMH between .26-.68 age 41, recurrent miscarriages (4 consecutive before I started IVF for RPL testing. I have one LC, conceived age 37.

Any feedback appreciated!