Anxiety
Well I think there are just things that everyone feels anxious about in their own way. I know I felt nervous walking to my car at night when I was on campus and I'd have to take a minute sitting in my car to relax before I drove.. lol. Nothing happened to make me feel anxious when I walked to the car, but just the environment. Anyway, so I think it's ok as long as you don't let your anxiety overcome you where it takes you an extended period of time to recover.
There are also just things you shouldn't worry about and those are the things you can't control. It's difficult to stop worrying about things that you worry about, but taking the time to tell yourself that, "Something could happen, yes, but it doesn't mean that it's going to." That helped me during anxious times, getting control of your anxiety is important because Anxiety attacks are terrible.
SO, take a deep breath and think happy thoughts.
Krista