Feel weak and sick. Could it be a virus?

You know how you feel when you don’t eat or drink anything all day? Well I’ve been feeling like that yesterday and today-lightheaded, sort of dizzy, my vision is swaying, headache into neck, and an emptiness in my stomach (like I haven’t eaten). I do eat a lot, but I haven’t really had an appetite the past couple days. Usually I eat about 2800 calories/day and I probably dropped to 2000-2200. I thought I was getting the flu again but its just the start of my allergies. Could this just be some virus? It’s nearly a weak feeling. Or could it be a bad diet? Too much sugar, sodium, carbs, etc? I’m not bed-ridden, so its not that bad. But what could this be?

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Answer:
Could be any number of things. The headache into your neck sounds as if you might even have meningitis. You should get to a physician at once. Are you feverish? If so, it's a clear sign of either a virus or bacterial infection. A doctor is the only one who can diagnose and treat you.