Where do you get the pain? Like I have IBS so I get the pain in the corners of my intestines...sometimes I will also get cramping in my stomach or the intestines behind my stomach but mostly I feel it in the intestines.
What other gut symptoms?
For instance, My intestines must also swell because the stool size (sorry TMI) will come out thin like pencils when I'm having a bad IBS flair.
Have you been able to identify triggers? Mine are dairy---mostly cow's milk but straight goat milk will sometimes trigger it. However, I can do goat cheese or butter with no problems. Also anything that "scratches" (my word for it) my insides like bran, seeds and eating too many of some kinds of nuts. (Things which have a lot of fiber.) Cocoa sometimes will do it was well. (A single blackberry with all those tiny seeds will set it off big time.)
If you suspect IBS, I would avoid these things.
Medication the gastro prescribed for it did nothing. They just made me sleepier...with severe stomach pain.
For two weeks when I was first diagnosed I tried everything I had ever heard of for stomach---probiotics, DGL, digestive enzymes, aloe vera, etc...in addition to the usual otc stuff.
Finally I remembered I had some Mycopryl in the house and within about 5 minutes after taking that, the pain started going away. Now I find that will usually take the pain away unless I have cheated with those trigger foods--then it helps a little but I still have to wait until those things work their way out of my system.
Sometimes I have to add an enteric coated peppermint supplement but that can cause heartburn.
Anyway, this is just what I figured out for me. We are all different so you will have to find what works for you but I would say to keep at least a mental diary of things you have eaten or taken when you get a flair and avoid suspect foods.
Oh, one more thing...tryptophan is a definite trigger. I had keep my IBS in control for a long time and took some of that and was back in that horrible pain again. This is a good article about seretonin and IBS:https://badgut.org/information-centre/a-z-digestive-topics/ibs-and-serotonin/
Also, a lot of ME patients also have IBS. This member's website talks a lot about IBS: https://cfsremission.com/