I passed my test but am now terrified to actually drive

Hey all, as the title says I passed my driving test which was amazing. 5 minors for hesitation mostly. I'm extremely lucky to have a car to start driving. I bought my car 4 years ago but had to stop learning due to health reasons, and ever since starting to learn again I have been a super nervous driver. My car is just over 20 years old which, compared to my instructor's car that's a few months old, feels a bit scary to drive. My car is mechanically sound and safe to drive on paper, i'm just terrified to drive into town or much further than my home. It's important to note that I live in a very rural area with the majority of routes being country lanes that i'm comfortable to drive on. Even though I learned to drive in a large town, I can't shake my fear. I also have had some traumatic things happen in my car which makes it hard to be in it which doesn't help.

No one in my life understands why i'm afraid to drive in or around town because when they first started driving they were confident. I'm not sure if I'm after advice or just the knowledge that I'm not alone in that feeling. Anything helps thank you :)