Someone pointed a gun at me on the highway and I’m completely shaken up

On my way home from work not too long ago, going on 35E north. Cadillac truck pulled up behind me, flashed the lights, then pulled around the left side, waved a gun at me out the window then took off. Then tried to run a few people off. Luckily I was able to catch the license plate. Called and made a report. Be safe out there people.