questions

When I went for my ultrasound after being on Clomid for 5 days the nurse had measured 4 follies all measured 10 or 11 at cd10. We aren't able to Moe forward with iui due to a pylop in my uterus. I am getting that taken out. When talking with the Dr he said so once we take care if that we can move forward with iui next cycle. Then he came back and said another note is your not ovulating and will put me on 100mg of Clomid for next cycle. I know during my last iui I did get a positive opk but the ultrasound 5 days later showed no ovulation. Now I have ALWAYS been regular never any issues. How does he figure I wasn't going to ovulate this cycle or were the follies just no measuring at a good size at cd10 after being on 50mg of Clomid? I am just confused I am going back in April for pre op apt so I can tall about the procedure and ask more questions. But if you have any advice it would be appreciated.