If you are having problems with the Metformin ask you Dr if you can reduce the amount to 1500mg a day, perhaps split it up into 3 500’s a day. Thats what I did for awhile.
I found that worked just fine and that the extra 500mg gave me problems. Diabetes is alot of “tinkering” with medications to find the right fit for ones body. By all means treat your lows. As you get accustomed to being in the low 90’s and 80’s you likely wont feel it as bad as previously posted.
Your running pretty high right now on your A1C and the Metformin may not be doing the trick but I would give it some time. Monitor it closley. If it is still giving you problems and you feel the Metformin is doing nothing I would explore a small dose of Lantus or levimer insulin with your doctor to get your A1C down further.