You likely have deeper unresolved issues, which must be investigated.
Having gone through anorexia, I'd say you would benefit from counselling/therapy and getting some advice from a reputable nutritionist to put you on a proper nutritional program.
You may have several mineral/nutritional deficiencies and if left untreated, will result in many unwanted negative consequences.
The symptoms you posted, are somewhat consistent with reactive hypoglycemia.
Should you happen to test normal for sugar during another like episode with similar symptoms, you might have postprandial syndrome.
Here's an alphabetical list (by no means complete) of the symptoms.
Anxiety
Blurred vision
Confusion
Dizzy spells
Fatigue
Headaches
Heart palpitations
Increased hunger
Irritability
Light-headedness
Sleeping problems
Sweating
Weakness
Your whole life is ahead of you and with the proper support and guidance, you can turn your health around and get to enjoy life to the fullest.
If you have any questions let me know.
Best wishes,
Niko
Hello~I strongly suggest that you see a doctor as soon as possible. You could be experiencing anything from epilepsy to violent anxiety attacks. The fact that you were anorexic is a concern as well, your body is not use to food and it could be reacting to it, that is a lot of sugar to put in it at one time, and when not use to eating, it can cause strange reactions. Again, please see a physician as soon as possible.