Emergency Emergency

So I talked to my doctor yesterday and he told me to go to the ER for a strep test.

So about 4 pm, my mom and I went to the ER. The dr. asked if I wanted pain medication and I said, 'Heck yes!' so they gave me 2 lortabs which are really strong. It knocked me out for the three hours we were there. They took a chest x-ray, put in a hep lock, withdrew blood. Then we sat around until they let us know that he is going to treat me for Bronchitis. So he sent me home with some antibiotics and orders for rest. How did I get bronchitis?