Could be an early version of diabetes, you shot way above normal range at the 30 minute mark there.

It does look like you went pretty high at the 30 minute mark.... I would agree with Stan that it could possibly be early diabetes - especially because your fasting level was high as well. However, your levels do go up, and then have a significant drop so that you feel the same "crashing" feeling that I do. Our test results look similar -except that yours are higher in the beginning indicating a possibility of diabetes. I have heard that hypoglycemia can turn into diabetes 2 - I read it in a book called the Do's and Don'ts of Hypoglycemia, written by Roberta that started the Hypoglycemia Support Foundation. I wonder if that could be a possibility for you? I'm just guessing though based on my own research! Your symtoms are identical to mine!

I've heard of a condition, supposed to be fairly rare, called dyinsulinism, might want to look into that as well.