Hello and welcome.
My Hba1c was 91 at diagnosis, so fairly high - but as it turns out I am a very ordinary type 2 and a few weeks of low carb eating and I was no longer in the diabetic range.
Depending on your age and how the surgery deals with diabetics, you might find that they are not open to the idea of doing further tests.
My way of dealing with the high glucose levels was to buy a cheap to use meter (I chose Spirit Healthcares Tee 2+ but there are others) and to test after eating to see if I needed to lower my carbohydrate intake any further than I had done after diagnosis. As it turned out I didn't, I got to a Hba1c of 41 - and I feel very well again. I used to do Atkins and so I knew that I have never been able to deal with carbohydrates.
Hopefully you will soon see similarly low numbers.
I had a very bad reaction to Metformin, so I stopped taking it after about 5 weeks - but I don't seem to need it.