Pain in lower left back symptoms and conditions

I was treated for a case of accute sinus infection in february of 2006 with Levaquin (750 mg for 10 days). About a week after the treatment (infection didn't go away...was put on a month of sulfameth which slowly worked), i woke up one morning with moderate back pain in lower left back. About 2 weeks later, my legs started tingling all the way up and down, including gluts and scrotum. A few days later, I started to experience random twitching of muscles in my legs. The twitching was constant and random throughout my legs, but also in some other muscles in my back, arms, and neck. After about a month, the twitching and tingling started to subside a bit. As the twitching subsided, i noticed a strange sensation in my left big toe. The sensation was a sort of weak feeling (as in the feeling of trying to make a fist when you first wake up). The sensation would come and go, but never went away totally. About a month ago, i noticed that the same sensation was occuring in my left thumb and two adjacent fingers. I still feel the effects today. I have had blood work and x-rays, with all coming out negative. I know my doctor thinks there is nothing wrong with me, but after doing some research, I'm pretty sure all this is due to the Levaquin. I am a 27 year old male, very healthy, excersise regularly. Has anyone else experienced this type of effect?