Hi Mumszword
Our symptoms sound very similar. I am at the one month mark of recoering from a bowel resction where they removed 40cm of diseased bowel and my endo had affected most of my pelvis including bladder, appendix, ovaries, POD and tubes. My rectum and appendix were stuck to something and endo was very widespread and extensive.
I highly recommend the surgery as right now i can say im disease free, and have not had any endo related pain that was debilitating before my op.

if you want to talk more feel free to email me