I backed into a parked motorcycle
I had recently been laid off and was going for job counseling. The building had a weird parking garage and a choke point paid exit. I tried to back up and turn into a spot, and didn't see the motorcycle parked behind me. Evidently I pushed one of them over and it knocked into another. I didn't check for damage, but when someone noticed they had fallen over, I didn't say anything.
I'm normally a very responsible person and own up to my mistakes, but I was stressed about the job loss, and was late for my appointment. When I left, it didn't look like they were damaged, but I didn't get out and check. When I got home I made a donation to a local charity to try and ease my guilt, even though I wasn't employed.
It's been a while, but it still gnaws at me. What should I do?