You could be describing my symptoms, i posted earlier that i have had gut problem for about4 years, i started hrt 8 weeks ago and the ibs type symptoms went and now i have , like you a gripping pain just under my bust
I have a ‘theory' i read quite a bit about bile and menopause. When your oestrogen drops so does bile production, so you get slow transit, bloating, ibs type stuff, so my theory is when your bile starts increasing ( due to hrt & increased oestrogen) then i figure that my gall bladder is none too happy.
I could be completely wrong here, but next time is see my gp i will tell him about it