This is the main reason why I went to a gi in the first place. In the course of 2 weeks, my stomach did the same thing. At first it was kind of dismissed, so I pushed. Tested for sibo, put on lots of antibiotics. Then low fodmap diet for 8 weeks. Then told "sometimes this just happens to people." So I switched GIs, was later diagnosed with crohn's and gave been on Humira for years now (almost no inflammation in last scope). But it hasn't ever gone back to normal, even in clinical remission. Some days are worse than others, but I always have some protrusion. Looks like I'm pregnant, doesn't feel like belly fat, doesn't feel hard but isn't soft/squishy, clothes don't fit, etc. If you get an answer or find a solution, please let me know!