66 year old male with managed high blood pressure. Previous deep vein thrombosis 5 years ago. Stayed out in the sun, exposed to allergens.....headache, nausea, chills, low grade fever, sleeping for days for approximately a 10 day period. Never stopped urinating ....drank bottles of pedialite. Felt better and last Mondaywent into a hot dusty building for several hours. Has been in bed again for 3 days. Is the Heat Exhaustion, extreme allergies, mini strokes,