Well, long before I started purchasing the Libre cgm's I would wake up during the night all clammy, heart racing and feeling really anxious. At the time i thought I was having bad dreams because that is what it felt like, or just general anxiety even though I had nothing to be anxious about. I thought nothing of them to be honest. It was only when I started purchasing the cgms that I realized it wasn't anxiety at all but low blood sugars. And of course I confirmed this with my test strips which correlated well with my Libre. One of the first things I did was to cut out alcohol (not that I drank a lot but I did like a shot of gin) that helped, but they still went into the high two's. So I contacted my Dr after reading that I should not be getting low sugar when not taking meds to lower blood sugar. She told me to increase my carbs. After increasing my carbs the low blood sugars stopped. Prior to increasing my carbs I also got them after exercise. I have been tested for GAD antibodies, C-peptides, lipase and something else , Amylase I think, anyways they all came back normal. I don't know what the GAD was exactly but it was below 5. The C-peptide was lower than I thought it should be but not in the flagged range. I have kept my blood sugars in the pre-diabetic range now for a good two years with diet and exercise alone but no longer. And to be clear my diet is not full of carbs. I increased the carbs just enough to stop the lows. I have no diabetes in my family history other than my brother who is T1. Autoimmune does run in my family but no T2. I feel complicated and difficult lol