I did have stomach trouble for 4 yrs, diagnoses ranged from IBS, gastritis, ulcer!, constipation you name it in that region I was diagnosed with it.
I started taking oral HRT in the April, by the May I was vomiting nice green bile🤮- GP = flare up in Gastritis mmmm. At this point I had taken every pill prescription and OTC for guts and nothing worked. I cheekily asked for a gall bladder scan- GP= nah you haven't got gall stones, but okay you can have one........
Scan = not only did I have a few bits I had a bag of huge marbles, fast forward to February this year , I have it out, the surgeon says it was rancid- low and behold ALL my previous symptoms have gone, vanishes overnight.
Not saying you have gallstones, but get it checked. Also the HRT didn't cause them, Surgeon said that it was a good 25 yrs in the making, but brought it to a head. Surgeon also said a low fat diet these days was regarded as hogwash- it is all genetic- well now there is a surprise.....