Hello, relax and have a normal and natural attitude. You needn't worry too much about insomnia. The more nervous you are, the more you force yourself to sleep, and the result is counterproductive. It is more harmful to sleep itself and health.
In fact, you are not that serious. As long as you think less, you will get better soon. Eating more fruits, vegetables and milk can also help you sleep. I wish you a speedy recovery!