I'm confused about
what you are asking, too. Do different doctors prescribe different meds? Yes. Is it up to you to inform your doctors about
what other doctors are prescribing? Yes.
When it comes to your diabetes, it is your endo who calls the shots. If you don't have a primary doctor, then maybe your endo should become it. He should be advised on all other doctors reports, tests, meds, etc. One of them has to have the full picture of your medical history at all times. (Sometimes this can even be your pharmacist).
Don't be afraid of insulin injections, if that's the way you have to go. Seriously, they hurt less than the finger sticks do. The needles are so short and thin nowadays that its like poking yourself with a hair. Trust me on this, I inject 5-8 times/day
Its possible that modifying your diet/lifestyle could see you avoiding or deterring insulin or extra meds. Maybe you want to try the "nothing white but cottage cheese and cauliflower" diet (no potatoes, rice, breads, pasta, etc.) for a while and see if watching your carbs and starches is enough to keep your BGLs normal.
Your A1C and average BGLs sound pretty good but, are they at this level with eating anything you want and being on meds?