((((((( WelcomeToTheJungle ))))))))
Well, you see it could be so many things. Anxiety, for example can make you hypervigilant, unable to sleep and lead to all sorts of fearful thinking. I am glad you are getting to see a psychologist soon as it sounds as though you are quite distressed. Let me know how you get on.
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Pegasus
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“Everybody is a genius. But if you judge a fish by it's ability to climb a tree, it will live it's whole life believing that it is stupid.” - Albert Einstein