Anyone get in a multicar crash?

I was hit last night, smashed , by a jeep behind me, but someone slammed into HIM first. I never got to take a pic of jeep that hit me, but got his name and the cops were doing all the work with the report details. They handed me a card with the Accident report number. My car was towed and I've never been through any of this. I'm assuming I call my insurance tomorrow to report it, but after that, I'm not sure if it all. 😩 My back bumper and trunk are really smashed so not sure if it'll be replaced or what. Any ideas ?
I am ok thank goodness but had whiplash neck pain this morning.