Timing???

So I had my first IUI and I’m looking back and spiraling 🙃
On Saturday morning I had an ultrasound with 1 17mm follicle, estrogen 84 pg/ml and progesterone .4 Ng/ml
I was instructed to take trigger shot pregnyl Sunday night and then had my first IUI Monday morning and second Tuesday morning.
My husbands samples were great (76 and 60 million 😳)
I’m concerned I released an immature follicle. I think it’s assumed it would grow in that time but is it unusual to not confirm an 18 mm follicle before trigger shot?
I also typically ovulate day 15 and my iui was day 12/13 though it was my first medicated cycle with lutrozole
I guess I’m wondering if this is all standard or should I be concerned? Thanks for any insight you have.