My son, 11 years old, has been unable to sit up or walk without being dizzy for four days. Yesterday, he started getting nosebleeds. He had two yesterday and about 3 or 4 today. They stop fairly easily. He has no headache, is a bit congested, coughs a little. He feels really bad in the mornings but seems to perk up in the afternoon. Decongestants kind of help, according to him, but doesn't stop the dizzyness. I suspect it's a virus but am not sure how to get rid of the dizziness