i do eat healthy and excerise A LOT. i play tennis everyday and work out everyday at the gym. but for little over a month i've been really sick. but it's something wierd. usually when i'm sick i have a runny/stuffy nose, really sore throat, and feel like crap. but i felt great, except for coughing so much. doctor said it was bronchitis. but after the 3rd time i visited him within 3 weeks, he had no clue what was wrong. had to take some xrays because the doctor said my lungs might be damage, but everything was ok. so he gave me some medicine last thursday, and it's helping. almost better.