Hi, sorry you are having a tough time.
I was diagnosed about 2 months ago, I have been taking Metformin for about 10 days. Before I had my first appointment I decided to grasp the nettle and try to do as much I can could to move the goal posts for myself with diet and exercise.
My approach won't work for everyone.... I pretty much cut all carbs, had no more sweet stuff and started to do as much exercise as I could stand, power walking on treadmill to disco. As a result I have lost over half a stone in that time and bought my BG levels down from over 17 to an average of 9.5, I even had a reading of 7.4 yesterday which thrilled me to bits.
I don't know how many changes you have made outside of taking the tablets. For me those big changes were crucial to seeing a good result.
There are others here with more experience who will help and advise but I hope you get it all sorted.