How were you diagnosed with endometriosis? Symptoms or an ultrasound scan?
I was treated for endometriosis for about 15 years - drugs, D&Cs, the lot - until someone thought to send me for an ultrasound scan. No "chocolate cysts", no sign of anything related to endometriosis. Only an additional 4 stone on me because of the drugs :roll:
After that they decided to call it "dysmenorrhoea", which basically means "heavy periods, lots of pain but no-one knows why". My symptoms were back ache, extreme pain in the cervix area caused by inflammation, really heavy periods (12 night-time towels in 18 hours was the worst ever) including clots like lumps of liver. Pain-killers and anti-inflammatories wouldn't touch it. Sometimes the pain was so severe I was literally sick with it. Also my periods were irregular - ie, more frequent. Just what I needed! I don't know how I managed not to be anaemic.
I wasn't diabetic then but I can imagine what it could do to blood sugars.
Eventually I found an understanding gynaecologist (female) who fitted a Mirena coil, which is progesterone-loaded and stops the womb lining developing - therefore no more periods. No periods, no pain.
It is obviously a contraceptive, but can easily be removed if you want to get pregnant. Otherwise, no worries. I had a bit of break-through spotting to start with, but after that 5 years of no periods and no pain. (I still have back-ache related to something else). When I eventually had my coil removed I was through the menopause without ever having a symptom.
I suggest you both go back and have a good discussion with your gynaecologists (insist on seeing one!). If you haven't already had one, you need an ultrasound scan to double-check the diagnosis. Then ask about the Mirena coil. It is now licensed to treat bad periods, not just for contraception, and lasts at least 5 years. I don't see why it shouldn't help even if you do have the so-called "chocolate cysts" (wandering bits of womb lining) elsewhere in your body cavity.
Don't take no for an answer. Things must have improved since my problems, about 15 years ago now. There has to be a way of stopping the pain, and in my experience the Mirena coil does it. Worth trying!
Good luck!
Viv 8)