My first damage was when I was driving down the highway and the truck in front of me had a vinyl bed cover and the side rail bar mount blew off landed on my hood, a pillar, exploded my mirror and destroyed my windshield.
Made it even worse when my girlfriend told me not even 30 seconds prior, "looks like his cover is going to blow off I'd move over." Me, "Naw its ok, don't worry."
I felt like such a dumbass for that trust me, and she rubs that one in to this day still!!!!! Accidents happen so don't beat yourself up over it.
Your car will be fine and best to walk away from it reset your mind and approach it later to repair what you can and wait to order a replacement antennae. Take your time buffing out those scratches and just leave the antennae alone, just my .02¢ worth.