Glucose tests always normal. episodes of severe dizziness, hot/cold flushing, feeling weak, feeling hungry. having sugar relieves symptoms.

Normalization of: Blood sugar may be to blame. If you're significantly overweight and Insulin resistant, your blood sugar may increase with a meal, and then drop to normal quickly, stimulating symptoms. This is not low blood sugar. It triggers symptoms even though it never drops below normal. Symptoms would go away even if you didn't eat sugar. Lose weight or you're at high risk to develop diabetes in the future.

Nonspecific: The symptoms you describe are non specific. Most people with these symptoms have no sugar problems at all. In your age group they are most likely related to anxiety, but thyroid disease needs to be considered. The fact that it improves with eating is also non specific and does not mean your sugar was low beforehand.