First of all, keep yourself busy, enrich yourself, carry out daily work, socialize and hobbies, fully mobilize yourself, and minimize leisure time.
Secondly, you need to train slowly and let your brain participate in the current real scene instead of thinking at the same time, so that your brain can't concentrate on what you are doing now.
Then, we must keep exercising. We want our brain to rest as much as possible. Besides sleeping, we also have exercise, which can slowly adjust the brain nerves. Especially taking part in outdoor sports can get rid of your own thinking. Mobilize your life, change your thinking and gradually improve your brain's extreme excitement and paranoia.