You can try finding something else to obsess over. Unfortunately aspies tend to always obsess about something. Try to find a healthy outlet for this nervous energy. You can start a new hobby like fitness, nutrition, investment or other ways to better yourself.
I cycle through a few different hobbies to occupy my mind. I also took classes. There's nothing like writing a paper that's due next day to get rid of other unwanted thoughts.
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AQ score: 44
Aspie mom to two autistic sons (21 & 20 )