I put my car into park while moving?

I know this can really mess up your transmission. It's the second time I've done it. Both times I've been moving slow, probably 10 mph. A guy drive by me fast and made me spill food in the floor. So I went to stop and I thought I was stopped and accidentally switched to park. I heard a few clicking sounds, but I drove home okay and my brakes seem to be working fine. I have a 2012 ford fiesta. If that helps. I think some cars have built In things to kind of prevent damage from this? Please tell me what to do. I don't want any part of my car to be damaged.

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