Hello, I don’t know whether this helps as I didn’t get an upset stomach after being on the same Metformin dosage as you but I had terrible flatulence and stomach cramps, especially if I took it after, not with a meal. Eventually, the doctor reluctantly agreed to let me have the slow release version of Metformin (more expensive) and that has improved things a lot, although it took a few weeks. Her original advice was to halve the dosage and give up eating leafy vegetables! I hope this helps.