Hello
I have gone through your question and understood your concern.
You had low sugar level or hypoglicemia after eating.
This situation can be explained with a condition called Reactive Hypoglicemia.
Reactive hypoglycemia occurs when blood
glucose levels become dangerously low following a meal.
This condition is the result of too much
insulin being produced and released by the
pancreas following a large carbohydrate-based meal.
This excess insulin production and secretion continues after the glucose derived from the meal has been digested, causing the amount of glucose in the bloodstream to fall to a lower-than-normal level.
So,medically speaking,(as i said earlier),you had Hypoglicemia and in your case it is reactive hypo.This means that you had a large carbohydrate(sugar) breakfast.
My advice for you is to avoid or limit sugary foods and drinks, and eat frequent small meals - the best treatment is to split your daily diet into several small meals and snacks, no more than 3 hours apart., which are less carb-heavy.This is all.
Hope i have clarified all your doubts.
If you have other questions,feel free and ask.
Regards.