I got a shot of Pro-vera for contraception purposes (prior to that I'd always used "the Pill"), within a month I was in shocking pain which gradually stayed 24/7 for about 18 months (couldn't even walk some days). I never knew i had endo until then, always had pain at period time but thought it was normal, I was 40. I don't know what the connection was to the injection, I never thought to ask. When I saw my gyno at endo-gynae clinic at RWH Randwick, he put me on Pro-vera tablets saying " I don't like the injections".
I tried Indocid suppositories and I agree with Sunny, they were a help. Other than that painkillers, hot water bottles; I even used a weight-lifting belt...flat and broad in the middle, that helped me. One that was quick and simple, a hand towel folded in half and half again, in the microwave for about 30 secs....warm and easily slipped into trackkies or pyjamas.
I feel your pain guys....hope this helps.
Linda