Ovulation or not?

queen

On my day 16 i went for scan, I literally had so much pain so my doctor expected ovulation, but my follicle was intact, 19x25mm, et-8.7

She oltold me sometimes it happens and we will take pain as positive sign that ovulation happened. She started me on progesterone.

Two questions

1. Is there any success story with this kind of scenerio?

2. She told me to take progesterone orally. I read vaginal is better. What to do.