WR, I'm so glad you are ok. I agree with the others, go to the doctors and have them check you out to be certain everything is ok.

Was there damage to your clothing? If so, maybe the police can tell if it was some kind of bullet or something that hit you. And yes, a police report would be good.

What about taking pictures of your clothing and injury as part of your documentation? You don't have to show them unless you want to or need to. But down the road if something comes up and you need additional documentation, these could be helpful.

Feel better soon.