It is very possible you have some adhesion issues going on mixed with some endometriosis. Additionally, if either are affecting any part of your intestines, then at different times your diet could increase your symptoms.
I had my appendix removed when I had my hysterectomy because of endometriosis. At that time, endo was left on my bowel walls. Additionally, an adhesion formed between the vaginal cuff and the bowel. I also have IBS. Altogether, those issues created quite a bit of pain and I finally had surgery to remove the adhesions and endometriosis.
Watching my diet and staying hydrated could help my symptoms to a degree. You might learn about an IBS diet and see if following that type of eating plan would at least lessen your symptoms. Also, try to make sure you are drinking plenty of fluids, especially if you are eating or taking fiber. For me, fiber made EVERYTHING worse!
Many of us with endometriosis also have Interstitial Cystitis (IC). I didn't realize that when it flared it added to the whole pelvic agony. There are foods that tend to be IC triggers so you may also want to try to follow an IC diet, again staying hydrated.
It would probably be wise to keep a very detailed symptom diary. Besides keeping track of your pain, keep track of what you are eating and drinking. You might find ReliefInsite’s online pain diary
useful as I did.
Are you talking to your GP about all of this as well? That doctor could also have some ideas and suggestions for what could be going on and how to treat it. You might want to consider seeing a gastroenterologist as well.