Ask your doctors for a fasting INSULIN test. This will show high if you are insulin resistant, and in extreme cases can show an insulin secreting tumor of the pancreas.

Eat small meals throughout the day. 5 if you can. Make sure some protein is in each one.

Large meals lead to more insulin secretion. Sugar and starchy carbs also spike insulin.

Also some liver testing may be helpful. The liver makes glucose for you when you are not eating...and if this is not happening, you will be low.

Lipoic acid may lower blood sugar in some people. Drop that one and see if you are better. I certainly would be investing in a glucometer and strips, and testing several times a day to see where your metabolism is going.

Stay away from juices as they spike insulin. I'd add in acetyl carnitine. This supplement helps the mitochondria when glucose is not available. Carnitine transports fatty acids to be burned for energy instead.