Clomid 100mg for IUI

So I’ve done 3 rounds of clomid and timed intercourse. This is my first cycle doing clomid and IUI. I took 100mg CD 5-9 and I’m on CD13 and went in for my 2nd ultrasound this morning and I have 13 follicles!!!! But the biggest only being about 10-11mm. I did 100mg last cycle too but only ended up with 3 follicles so I’m not sure why it changed so much this time. I usually trigger after my 2nd ultrasound so for the largest to only be 10-11mm right now is odd for me. Anyone else have similar experience? She’s hoping at least 4 take off and the rest drop off but who knows.