Biaxin XL and imaginary line

I was on a ten day course of Biaxin XL for Bronchitis. I also take Wellbutrin (150mg a day). No side effects until the eighth day of my course. I was in class, in the morning, and squatting down talking to a friend. As I got up, I was extremely dizzy (like a drunken dizzy) and seeing double (over/under).
Walked myself to the hospital (across the street), doc suspected a middle ear infection, and shot me up with Gravol, put me to rest for 2 hours. When I got up, I was still seeing double, metallic taste was there also. Got a ride home, and rested more. CT scanned that night with no conclusive evidence of any abnormality. Doc performed a variety of tests...made me walk an imaginary line (Like DUI test) and I kept stumbling to the left side. Had 9 vials of blood taken the next day, they suspect might be something wrong with my blood. Going for an MRI soon. Took 9th day of course, then found this site. Flushed the last days dose. I sure hope it was the Biaxin making me dizzy! Other than that horror, no other side effects.