This is not something I have ever seen happen, although I have noticed that if my glucose levels are in the middle of dropping quickly, I can FEEL hypoglycemic, break out in a sweat, etc. even though the numbers are not below the normal range
at that exact time. So I suppose it is possible that this was the case. When I show symptoms of hypoglycemia but the number on my glucometer shows me to be in the normal range, I have learned to trust the symptoms and treat it like hypoglycemia.