I am not a medical professional but I do suffer from endometriosis. The sad part about endo is to my knowledge there is no known exact cause. It just shows up out of nowhere. Prior to me being diagnosed with it I had very normal periods. They came like clockwork. I could set my watch by it. I have always had bad cramps and heavy periods which do come with endo, but even when my endo is not active I have that. Things that have helped me manage it have been surgery, pregnancy, and birth control. Again, to my knowledge, there really isn’t an exact cause let alone an end all be all cure. I wish there was but nope. I’d be curious to learn what all you find out through your investigating. Keep us posted!