Sometimes it is just that way. No worries about the post. I know how that goes. I wish I had an answer for you. But, endometriosis could cause that type of pain. Sometimes, our bodies do react to the hormones and it isn't able to be detected through standard medical tests. I hope you begin to feel better and all works out! :)
Sorry to put you to having to answer this. I was posting to a doctor on an expert forum, or so I thought, and then all these choices came up on the MedHelp screen, and I kept clicking until they demanded no more choices, and here I am on the Ovarian Cysts community. :) Anyway, I went to the doc today and got an ultrasound, and they didn't see anything unusual, so I guess the pain is still a mystery.
I really don't know the answer to your question. But, in theory it truly makes sense that you could have pain during this process. I think you should contact your doctor to be sure there isn't anything else going on. I hope you feel better soon!