Five and a half years ago a car made a left into my lane as I was coming down a hill at about 28 mph. It stopped mid-turn and I went over the hood, wrecking my bike, scraping my chin, shoulder, and knee on one side, and breaking my wrist on the other. I started trail riding again the next spring, but I avoided roads because cars made me skittish. Eventually, I started commuting again, but took a different route to keep away from cars as much as possible. Those routes were fairly boring rides and I stopped commuting by bike.

Last year I decided to try the old route one more time. When I approached the intersection where I was hit, I slowed and crossed through it at about 20 mph. As I approached the traffic light at the next block, I exhaled and realized that I hadn't breathed for about a block. After a year of occasional commuting on that route, I still slow down at that intersection and am more distrustful of cars there than elsewhere. It may not be rational (the drivers don't know my history there), but it's what I do and I'm OK with that.

Take a break if you want to. If you resume riding, consider less worrisome routes. If you go back to your current route, make whatever adjustments in riding speed and style that you want to feel better. Riding is supposed to be fun. If you aren't enjoying commuting because of worry, don't commute -- there are other ways to enjoy your bike. Good luck.