When ever I feel tension driving, I will just pull over to the side of the road where ever I am and just have a cigarette break. Till I feel better then I will get back in the car and continue where I was going.
Driving can be stressful, I am bipolar and adhd so I am distracted and not a very safe driver, so I stress myself out because of my lack of attention to things.
I get distracted thinking all of the time. It is annoying.
Mybe you can go to the doctor and get Clonezapam that is what my doctor gave me for anxiety.