Question from Maryland, USA:

I never been to a doctor to correctly know what is wrong, but I can say I’m most likely to have hypoglycemia. I say this because its happened twice in my life so far. The first was about six months ago, scary, and I had no idea what was wrong. I had given blood, and that night, while I was performing in a chorus concert, I began to sweat and have abdominal pains, like an upset stomach, I began to shake and my vision was blacking out. After I walked off stage, my hearing became also a blur. After sitting down on a cold floor, I was reluctant to have a friend get a soda for me, but after that and a few chips, I felt better. My mother told me I might have blood sugar problems, but I thought nothing of it until it happened again — this time at my work. Again my vision blurred, my legs felt heavy, and I couldn’t breath very well. I felt weak and lightheaded. After a soda and rest, I felt better, though the weakness carried on for 40 minutes. What do you personally think I should do? What do you personally think I could have? Is there anything I could do to treat this problem?