The way you let your anxieties circle is very familiar. I often can't fall asleep because I can't fall asleep. I si because I feel guilty over si. Etc. You know what I mean.
Positive thinking is a concept I wholeheartedly endorse for others, but seem to be terminally bad at myself. (yes I know, hypocrite am I) I really hope you will find it helpful. Please let us know how it goes!