LZ
This is very unfortunate, here is what you should do:
1) if you car still drivable, drive home first, otherwise, tow to garage;
2) contact your own insurance and report to them with police report, cars and person involved;
3) adjuster from insurance will contact you;
4) appraiser will contact you;
5) if bodily injury, visit hospital to check up, tell insurance company too
If you think this is too much, our shop is open and please feel free to let us know what we can help.