I am 69 and have been a type 1 diabetic for over 50 years. There is not much for me to add to the excellent advice above--but I was wondering if you are taking any oral agents. Around 20 years ago, when I started experiencing transitory insulin resistance with peri-menopause, I began taking metformin along with insulin. I found that 500mg in the morning evened out the "roller coaster" considerably. This isn't for everyone--since some people have unpleasant gastric side-effects (though they often resolve in a couple of weeks), but I found that my diabetic gastric complications actually improved significantly. An added benefit for me (I don't know your gender) is that metformin is known to mitigate the risk of gynecologic cancers.
I've always been a little annoyed at the current dogma that an AIC of 7 is more than fine for elderly people. The reasoning is that low blood sugars are more dangerous--given the few years left to us--than any complications that might develop in that time. This reasoning is sound if the diabetic is unable or unwilling (certainly not you!!) to try some simple measures to tighten things up. However-even if complications don't result--and they can in a couple of years with a 7 AIC- a blood sugar roller coaster can affect QOL and can actually result in more hypoglycemic episodes. Currently, (after a misspent youth with AICs over 18) mine is below 6 and I rarely have low blood sugars. Rather late in the game I started using an insulin pump which is linked to my CGM. That has helped immeasurably. I also eat a low carb diet and exercise--and my CGM readings make a beautiful flat line.