Yes that's classic anxious thinking. You're focussing on how you feel internally, which is making you hyper-sensitive & on site. If you make an effort to break this habit by shifting your focus to external things you should eventually find yourself forgetting to be on such a high alert. Each time you find yourself "scanning" how you feel, turn your attention to something external that you're aware of & even say it aloud if necessary ("I'm aware of the TV being on... I'm aware that it's BBC2... I'm aware that it's QI...etc").