Fasted blood glucose of 105 is a sign of insulin resistance. THere is little doubt about that. Only thing that will help is for you to switch from burning glucose to fat for energy. By giving your cells a break from constant insulin bombardment it will sesitize them again. The HRT will also aid in this matter. It's not just diabetes but looking at the whole picture that will fix the problem. MOST important is the diet. If the diet will still run your glucose numbers high your pancreas may be burned out. You could try lipizide/or metforming and such but hopefully you will recover to the point where your body makes enough insulin and along with the TRT and other hormons working better to sustain at least a low carb diet without need it drugs.
If you need more pointers with the diet let me know. Dont be scared of eating fat, it will not harm you at all actually im sure it will help you in many ways.
If you did low carb and still stays up the pancreas may be the culprit but who know everything needs to be checked to make sure.
If you want go low carbs basically protein, fat, vegetables. In a few weeks or so things should change with your body. Then have a carbs meal like a maltodextrin drink of 50g of carbs and check your glucose every hour. See what you get. As a matter of fact do that now to have a base line and then try same later to compare. If you are insulin resistant you will see the difference.
Now for this purpose I would eat the carbs solo. When you add fat and protein in the mix it affects absorbtion. When I check mine with the maltodextrin I drink it by itself. This way there is no interference. Good point!
I am not a medical Dr, please keep in mind that this answer is for information purposes only, and is not intended to diagnose, treat or replace sound medical advice from your physician or health care provider.