Thoughts on low follicle development?

Christy
Hello! I'm new here and we just started injections. On day one, they saw 8 follicles (3 on right and 5 on left). We started PM injections of the 300mg of the pen and 150mg Menopur.
We went in this morning for day 4 bloodwork/ultrasound and one saw 2 follicles at 9mm.
My docter seemed surprised and then very hesitant. I felt that she was trying to be positive but it felt like maybe something was not going well.
Has this happened to anyone? What was the outcome? Do I need to be worried about them cancelling the cycle?
I'm 41 about to turn 42 and my husband and I are nervous that we just waited too long (focusing on careers, etc).
Please let me know! We worried and stressed (or really, I'm worried and stressed). Thank you!!