Emmy hun, Hugs to you! Unexplained pain would have to be the most frustrating of all given you are not sure whether it is in your head or real. I too get quite bad O pain, enough so that I have to pause in my conversation until it is passed. I wince through it as well.

However, given this pain is different, it might be something else. Have you had your appendix out? Apparently the two can get confused, O pain and appendicitis.

I read somewhere that as the corpus luteum bulges to mature the egg, it can be as big as 20 mm (2 cm) on your ovary, and is called a blister. On some people this can be very painful.

Given your history with the eptopic pg, I would certainly see your doctor. It might be that under normal circumstances your ovaries look fine, but they might bulge when ovulating, or you might multi-ovulate.

Good luck