I've been on metformin (3x500 mg per day) for about 14 months now, for insulin resistance and obesity and while I got into the normal weight range and lost a total of 21 kg so far, I seem to be having an odd problem pretty often: no matter if I'm hungry or full, I have a strange discomfort in my throat and my esophagus. It's not pain, it's not really the firey belching thing, it's just discomfort that refuses to go away for up to 3-4 days.

It started after about three months on metformin and was mostly present at the end of my period, but for the past two months, it became pretty random.

I am pretty clueless so as to what I should say to my GP and my endo, if anything.

Any ideas on what's wrong with me?