Lets Talk Blood Sugar

I had GD or missed the mark by 1pt (failing one number and missing one more by under 1 point) for the last 3 pregnancies and the size of my babies prove that one point cutoff is ridiculous and I had GD. Unfortunately Drs just say to cut the sugar blah blah blah....real helpful, NOT. Never gave me a glucose monitor or even sent me to a nutritionist??? So I forgot about it and moved on with my life until I recently got the highish A1C reading on my blood work. Im truly praying that when we get off this mountain and get more sun, as vitamin D levels normalize, so will my blood sugar. I am not entirely sure that will happen though as my grandmother died at 54 after being on dialysis for 3 years, having no sight left and 5 massive heart attacks all due to diabetes complications, my dad was diagnosed diabetic in an emergency room with sugars over 500(yes he was VERY sick) and my aunt and one uncle on my moms side are also diabetic. My odds suck. Plain. And. Simple. So I decided to start checking my sugars here and there to see what foods(I mean I eat super healthy) were causing issues. Oddly enough most foods I tolerate very well with blood sugar dropping back into the high 80's or low 90's within 2 hours. My problem seems to be lunch/afternoon snack. My blood sugar is just shooting straight to 140 by one 1 hour and 160 by 2 hours, then 140, 3 hours post parandial. I am trying to stop the afternoon snacking in order to keep my blood sugar more stable. I have learned that snacking is not good for my system. After breakfast I peak about 1 hour post meal around 115-120 and then drop shortly after. I do typically have cinnamon at breakfast on my oats or Quinoa and I read cinnamon lowers sugar so maybe thats why. At dinner I never go over 100 and heres why I think that is. I am practically french at heart, not a lush, definately in moderation......but I drink a glass of red wine with dinner EVERY single night. Its my guilty pleasure and apparently it may be saving me too lol. I can even eat a homemade whole wheat choco chip cookie after dinner and BS never went over 101. ??? Crazy huh. Im half tempted to make my wine at dinner only 3 ounces and have the other 3 ounces with lunch and see what happens. I rarely drink more than 6 ounces of wine a day anyhow so why not split it up? But really I am afraid it may make me a tad lazy midday which I dont want either. hmmmm what to do. I am going to try for almost no carbs midday for a few days and see what happens. I most certainly dont want my BS in the 160s like EVER. Anyone struggling with normalizing blood sugars? This is all new to me so if you have any advice I am all ears and I guess I should say I am not diabetic(YET) but have been diagnosed glucose intolerant since I was 23. Oddly my FBS are usually 88-95 so they arent really all that high. Its my post parandial sugars that are obviously driving up my A1C's. FBS does go up to 119ish when preggo but drop as soon as I deliver. Anyhow I have always just tried and thought I was eating right. This is the first time I ever tried getting a real picture of what was going on and Im now trying to get a handle on these sugars. At least I know now that snacking is a big no no for me. I used to think it was healthy to snack every two hours on nuts, V8, string cheese etc. Not so much.