I am experiencing the same thing. Been going on for a few months. My surgeon even scoped me to make sure I didn't have an ulcer in my pouch. I find some days are worse than others. As I have eliminated things , the common denominator for me seems to be stress. It hits my stomach.
Some days I am more discouraged than others, but I am not sorry I had the surgery.
This will pass, I am sure of it. I am almost 4 months past surgery. On my bad days I just eat yogurt, cottae cheese and drink my Protein shakes. That gets me through the day