Wow that sucks...I can relate, the first drive after we painetd my cuda...the driver side rear wheel came off.
I was going down a country road, on my way into town after finishing the car, and felt a horrible vibration. I started to slow down, got down to 5 - 10 mph, and bam, back of the car slamed down, and the wheel went striaght past me into the ditch. All in all the damage was not too bad. Kinked the quarter a bit and some damage to the wheel lip.
My dad, who painted the car, was following me into town, watched the whole thing go down and was not impressed!!!
A week later it was all fixed up and ready to go!
Good luck and hope the damage is not too bad!
Jason