Before I was diagnosed with Endo, I had a lot of similar issues. It didn't matter what I would eat, I would feel bloated and gassy all of the time. Driving hurt, going over speed bumps or coming to a stop literally made my stomach feel like it would explode. I cut out different foods to figure out what the culprit was. Ultimately, the only thing that solved my bloat was cutting sugar out entirely. I ate a lot of steamed veggies and lean protein. At the time, I didn't know I had endo and wasn't educated on how much it affects your body. I've read some resources that say that endometriosis can make you have malabsorption of certain foods, so your body can react as if it's intolerant to those foods. The whole 30 diet can be a bit rough but its a good start to finding out what might be causing the bloat if your body is taking on an intolerance to something.
I still struggle with bloat occasionally and it is a lot of the time associated with pelvic pain. I still keep sugar very limited in my diet and I would say that it helps a lot. I also recommend eating hormone-free and keeping processed foods to a minimum as it can increase estrogen cells that contribute to endo. That is one thing I'm just now learning. Hope you find out a way to help your tummy problems. Its the worst, I feel for you.

I have the same problem. Was diagnosed with stage 4 endo almost 5 years ago and refused any change conventional treatment. After a lot of research figured out that a gluten and dairy free diet really helps. In fact this even helped with joint pain and swelling due to rheumatoid arthritis. The bloating didn’t go away completely but was much less uncomfortable. My GP suggested taking a natural IBS relief tablet half an hour before eating. This works really well. Hope this is helpful.

I would also recommend looking up ‘Deliciously Ella’ a cook book by a lovely lady who turned to nourishment to cure her rare autoimmune disease.

I use digestive enzymes to help minimize my bloating. Probiotics are a godsend as long as it’s a good one. I’m trying out a new one but I swear by innate. Although a good probiotic it can be a bit pricey but well worth it. Twin lab is what I love for digestive enzymes. They are def not cureall but it helps!

How were you diagnosed? By surgery? If you can find a good doctor that will excise it I would definitely do it! Other good options are continuous combination birth control and or the progesterone cream. I’d opt for surgery and continuous combo bc. I’ve had 4 surgeries after the first 2 and combo bc continuously along with daily Prilosec/nexium I did amazingly well. I got too old for combo bc and couldn’t do the progestin only pill so I quit completely and went too long without surgery and I’m on the mend but really wish I hadn’t let it get this far. Good luck! I hope this helps. Definitely check out endo resolved website.

I also cut sugar out but my tummy swells and feels real tight like a preggy belly wheneva my body prepares for my monthly cycle and during my monthly cycle so people keep asking me or at least telling me that i'm pregnant so that really upsets me. I personally don't know what to say to people because i told my fiance that people should stop with this pregnancy questions wheneva they see my swollen tummy. its been years so i should have a dozen kids by now according to people who saw my stomach over the years.