Seriously without CGM , it's very hard to analyze BG. When I have my own CGM, I watched my morning glucose around 7-8am before I eat because that would be the most stable, average glucose for the day. I am able to hack to understand my glucose after analyzing series of data. With just one glucose number it really doesn't mean anything esp. if you consume carb and diabetic.
It's actually more interesting to see the data of what CGM provide before and after blood donation,especially the valley and the peak before eating and prior.
The T will force the body to be more insulin-sensitive. It's something that I can feel too.