Sometimes I hate where my mind wanders to

I don't know why I do this, but I do. I always manage to dream up horrible outcomes when wonderful events are approaching. My boys are leaving tomorrow with their Grandparents to go up to their cabin for a couple weeks. I will be going as well, but not until Monday. So, while I should be really excited about some free time and a fun trip to LA for a wedding, I can't shake this black cloud hanging over me. I always feel that when my boys are going to be away from me and out of my control (that's the kicker) that something horrible is going to happen to either them, or me. And now that I have written it down and said it out loud, I feel like I just sealed the deal. I know that they are in wonderful hands and will be very safe while I am away. Am I the only mother that does this? I really have no reason to think like this. I am sure that the car accident that Prince Charming and I were in about 10 years ago has something to do with it. That opened my eyes and really showed me that anything can happen at any time. Good and bad. I just really hate it when I dream up crazy thoughts. I know that when I wake up tomorrow and the boys are so excited to go on their trip, that all of the fun things about the cabin will fill me up and I won't even remember why I was so worried in the first place. Really, do other mothers do this, or am I the only crazy one?