Whenever I go very long without eating I feel very dizzy and lightheaded, weak, shaky, etc. People will come up to me and say, "Melissa, are you okay?!?! You look so pale!" I think my blood sugar just drops. Is this hypoglycemia? It goes away within a half hour if I eat something. It is really annoying because when it happens I don't trust myself to drive and usually the whole reason why I forgot to eat is because I was going someplace. Or once I felt the same way after I donated blood. I learned that my body wants to keep its blood after lying on the stupid table thingy for hours during my school day. (The blood drive was at my HS.) I felt so weak and the nurses kept telling me I looked horrible and wouldn't let me even sit up. And they made me drink two whole cans of coke. I would say that usually if I go 5-6 hours without eating or only eat a little bit during that time that is when it happens, though sometimes it is more or less. It is especially quick if I am active during that time. Should I worry or just be more responsible about eating on time?