I had stage 2 endo diagnosed during a lap & dye in 2007, the surgeon ablated the stuff on my ovary and uterosacral ligaments but left the bowel because she didn't want to risk perforating it. Since then I've had two children and pretty much breastfed throughout, hoping that this would help delay the return of pain.
Now my cycles are back, so is the pain
My question is this: did your endo pain ever just change suddenly? I'm suddem;y experiencing a lot of pelvic floor discomfort, to the point that I couldn't actually sit down squarely during one day of my last period. During ovulation the pain is worse than ever, and it seems to set in a day or so earlier than it used to. I'm getting increasing amounts of pelvic floor pain that seems to spread through my bowel / rectum 
Can you think of anything to try before I go back to the GP? I really don't like discussing this kind of thing IRL, I get horrendously embarrassed and feel really claustrophobic. DH is a GP and he locums periodically for the surgery I attend, so this makes me feel even more embarrassed about going (I'm not just an anonymous patient any more). I don't want to talk about my bowel movements and painful sex with someone I'm likely to see for Christmas drinks this year 
Anyhow, massive ramble but feels good to get it off my chest. Any advice or solidarity would be greatly appreciated ... thank you x