What’s the next step?

This is my third round of clomid. I went from 50 to 100 and this cycle 150. I went and got my progesterone level tested yesterday and to my surprise it was 0.0. I’m at a lost for words because I felt like I truly ovulated. I had a positive test I felt what I thought was ovulation pains the next day after my positive. My dr is supposed to call me back later and let me know what steps to take next. I just pray that this is not a sign of not being able to have anymore kids.