Hi I really sympathise as I suffered a great deal myself, I'm now convinced I had endemetriosis although on the 2 occasions when I was scheduled to see a gynaecologist/ have a laparoscopy, I managed to conceive! (we were ttc).
Funnily enough, I have 2 children now and absolutely no bother at all, maybe the odd cramp but nothing like I used to get. A friend also had endemetriosis and had her baby through 4 IVF cycles (she was married to a GP so I assume she had access to plenty of info re painkillers etc, also had a laparoscopy. She uised to take valium to relax her muscles, the pain was so bad. She doesn't have any bother now and actually managed to have a baby naturally which was a lovely surprise as they weren't ttc, didn't think any point and she was also over 40.)
My GP was sympathetic and gave me co-dydramol 30/500 (a step up from co-codamol 30/500)and also ponstan forte (mefenamic acid 500mg). I also bought a TENS machine which helped.
The problem was you can't take those painkillers on an empty stomach so I sometimes found myself having tea and toast at 3am! I'd also have to have hot baths during the night sometimes and hot water bottles were a Godsend.
I'd be crying sometimes with the pain which would go on for a week after my period had actually finished. strangely, I didn't have mych flow (sorry, tmi) whereas I do now, but no pain!
The co-dydramol would make me feel quite spacey which was great at times but not so great at work (am a teacher and would sometimes have to go outside the classroom door to cry with the pain, but i was never off.)They also made me incredibly thirsty and dehydrated and the effects on my degestive system were not pleasant!!
I still take them for facial pain (I clench my teeth at night) but sadly, they don't give me that wee glow any more as I've been on them for so long!
My DH was great although I'd have to warn him that I wasn't being moody, I was just in a lot of pain and it made very me irritable and he should try to stay out of my way. I don't think he really understood this though and was convinced that I had mood swings!
I honestly didn't but it's hard to feel cheerful when you are in terrible pain.
I don't know how i'd cope if I still had that pain now with 2 DS.
Eventually, I kept a diary for a few months, noting every symptom and what medication I'd taken. I typed it all up and showed my GP.
He was appalled and referred me to a gynaecologist straight away so it might be worth doing that.
Good luck and sending you some gentle hugs.