Sounds like anxiety. If you feel it getting out of control, you can take a benedryl or even a dramamine and watch some tv or something distracting like above poster suggested. Sometimes our brains take over and it's hard to stop it. I have a script for valium and when I get to that point, I take one and it all goes away. It's rare to get to that point but I feel better knowing I have something I can take to calm me down. I sometimes get myself SO worked up that nothing else helps.