For 2-3 weeks my blood sugar has not been in range according to my OB. Today has been good… almost too good… my numbers have stayed below 130 all day 
versus my normal 140-180 2hr postprandials ive been consistently seeing.
I feel like this is the calm before the storm… maybe my pancreas’s last efforts if you will. I have felt very off all day like foggy almost but blood sugars have been fabulous 🤷🏻*♀️.
To good to be true? Oddly I just talked to OB yesterday about insulin.
I have T2 but until I was pregnant in 2011, it was managed with diet and metformin. I knew I was going to fail the glucose challenge test, I did. I was put on a sulfonylurea which was an unmitigated disaster when it came to rapidly tanking blood sugar and general feeling like crap. Then I was placed on insulin and it was like a whole new world and with tight control over what I ate along with religious blood sugar monitoring my A1C went below 6.0 for the remainder of the pregnancy. Little Miss was born full term at 7lb, 2oz and no complications.
I stayed on the insulin for 6 weeks post delivery and then went back to metformin which worked well enough for the next two years until it didn’t. Frankly I expected it because my mother had T2 diabetes as well. I’ve been on insulin for 3.5 years now to good effect.
Personally speaking I felt the fog effect after my blood sugars had been trending high for a while and then made it consistently into controlled range. I think your body gets used to being a certain way and then when it is doing what it’s supposed it doesn’t feel so great until it gets used to it again.
All the best!