I was just recently in the hospital for treatment of cellulitis a...

I was just recently in the hospital for treatment of cellulitis and my doctor ordered Levaquin via IV. I had taken it orally before about a year ago for a respiratory infection. 2-3 minutes into the IV being turned on I felt the worst burning sensation and pressure in my lungs like I suddenly had horrible pneumonia. Everytime I tried to breathe I had to cough like my lungs were full of fluid or something! They ran tons of tests and everything came back normal. They had to give me a shot of Benadryl and it eventually calmed down. Anyone else experience this?