No one can make a diagnosis, only your doctor can do that. It seems like you may be hypoglycemic though which shows that your pancreas is beginning to become challenged. The thing that would concern me is how high your bg goes initially after consuming glucose. Usually glucose is only present in your urine when you go higher than 180. It seems that your Phase 1 insulin response is dysfunctional, but you still produce insulin with a Phase 2 response, probably too much. We call this insulin resistance and many pre diabetics start out like you do and morph into diabetes. So please discuss with your doctor what steps you can take to control IR.