Hi I also have MG and type 2 Diabetes. It is a balancing act with meds etc.
I was also having problems with Metformin. My doctor told me to reduce my dosage to a level where It was not causing stomach Cramps. I was able to reduce from 3000mg daily to 2000mg but I had to increase my insulin.
Having MG gives you higher blood sugar readings (due to meds etc). There are some similarites between the 2 conditions. Because of the MG I cannot exercise a lot. A couple of hundred yards walk wipes me out for the day.
Keep your chin up.