Hope you have managed to find a bit of equilibrium in your work since you posted this up. Have you thought about doing something like a the Advanced Motorist Course? I went out with volunteer assessors and then did a test. It taught me to really look ahead and read road conditions better than I was before. A great confidence booster. Although there is a cost, £150, it’s probably cheaper than long term prescriptions if it gets your confidence back. Keep well.