Hi I was sorry to hear that reply. It does not sound defeatist, it sounds like you need some better medical care than you have recieved.
I can relate to being fed up with doctors. I have been lucky, I have a long term lady GP that works with me. But I am wary of new specialists in the regional area I live in based on past experience and having to fight to stay functional.
As someone that has lived with chronic pain for a long time, I can only say it helps to have times without pain. To get a few days/ nights continious pain that would drive anyone to anxiety.
The tens seems to make me feel better after I have used it, I find I have to move it around to get right place to get relief from nerve type pain afterwards. The heat pad at same time also helps me get to sleep afterwards.
Whoever was telling you that you didn't really have endo as they only saw a little bit sounds like they don't understand endometriosis or were being unhelpful. I have the stage 3 diagnosed but have learned that these days they don't always remove it as they understand the pain causing endo might be a very small and spread in muscle or on a nerve anywhere.
The med I was trying to remember was Amytriptyline (endep/elavil) , very low dose 10mg. I read somewhere that is a treatment for pelvic pain too and it worked okay for me and helped with sleep and night pain but gave me sugar cravings so I stopped. Am thinking to give it another go now and just ignore the sweet cravings.
I hope you can get some pain relief too and pain free time soon. Good luck Bye