I am the same way, never know if the spaghetti sauce will make me flare up this time or not. Can eat the same thing 5 different times and get a different reaction almost each time. I feel bloated ALL. THE. TIME. Dr just keeps giving me meds but no tests to see if it's something other than ibs (which i was dx with a number of years ago). I'm so frustrated.

i did two different food sensitivity tests and each one had different foods come up except garlic came up for both and now i do notice all my symptoms happen when i eat garlic even garlic powder. but it can’t be the only trigger i have but at least i found one

Unfortunately the only thing that has helped me even a little in identification is following a very strict low fodmap diet. If you know there are a few foods you do well with/most likely do well with, I'd stick to those and test as you go. I've learned a lot about my system that way, but I will say it has been very tough! Hope you are able to find some relief

I have GI problems also and how I deal with it, mine is due to stress, if I'm not stressed I have no problems with my GI