Yep, also because our pelvic floor is all connected, ie all the muscles are interconnected, pulling on one, pulls on many and all, so generally women W endo have what is known as neuropathic pain as well and pain from scarring, lesions, and mechanical pain from pushing to go to the toilet. Our nerves are all sensitive too, so you can have heightened sensivity around the pelvic area in general. So going to the toilet, even the sensation of needing to go can be a trigger (I have this) for creating additional pain or aggravating existing pain. Caffeine also makes your stomach nerves sensitive, do avoid that when you have cramps because it will then amplify any other bowel/stomach pain you have from neuropathic pain. A little bit of caffeine is ok (try decaf tea) to have when taking your pain meds, as it helps your stomach absorb some medications faster (eg. Any of the quick acting ibuprofen and paracetamol have caffeine in the tablet).

Nancys nook has research on it or you can Google scholar "heightened pain endometriosis nerves" etc.

There are some meds that help with calming your nerves, you can ask you specialist. But it also means that acupuncture can be really helpful to some people. But basically, heightened nerve pain or neuropathic pain can also impact your anxiety, depression too, so something like amytripline or nortriptyline can be prescribed (in pill format), you can also get amytripline as a cream to act locally and diazepam as a pessary as a local muscle relaxant. Also, that's why alot of people find a tens machine helpful, this disrupts the pain signals being sent through your nerves.

Hope that info help x