I can relate to how you feel. A couple of weeks back, I swung a Weed-Wacker around while in my Garage and put a really nice size ding in my 3 Year old Flawless Mustang GT. First and only ding in the entire car and I did it while parked in the garage.
But like Smitty says, a good painter Can fix almost anything. The important thing is that it IS fixable so don't beat yourself up over it..
Hoop!