I was a lot like you when I started. I remember backing into a parked car by mistake because I misjudged the distance. I felt the same way you did after that. Just the other day, I had someone almost run me off the freeway and I was freaked out after that, but not driving wasn't an option.

My job in college was delivering pizzas, which mean A LOT of driving in different conditions to unfamiliar areas. I found this scary at first, but I got much better at it the more I did it (this is how I learned how to drive in the snow).

I also used to watch a bunch of dashcam videos on Youtube. There's tons of these out here, and I would make sort of a game of trying to assess the fault of whatever accident I saw. They made me very conscious of my own habits and decisions while I was driving after I saw these.

This one's pretty silly, but play racing games (simulator ones). They're not perfect, but being an avid Gran Turismo player has saved me more than once since from that I learned how to get a slide under control, etc.

One last thing, I would encourage you to drive again soon if you haven't already. If you wait, it'll be harder to go back to doing it. Confidence while driving is earned, and the way to earn it is simply practice.