Hello! I read your question and understand your concern. I dont think that there is anything to worry about. In my opinion the problems you have had are related to changes in blood sugar level. You should know that fruits are a resource of slow release glucose. While chocolates and desserts are resource of fast release sugar. So you have a high amount of sugar directly in your blood after a chocolate which causes your body to produce an appropriate high amount of insulin which can overcome the blood sugar level and cause hypoglycemia. Hypoglycemia is often associated with fainting sensation. I would recommend to avoid chocolates during your break and try fruits or toast instead. Hope to have been of help! Greetings