Hello, the sleeplessness can be related to some stress in your life as you have mentioned that you get tensed for unwanted reasons. Try to introspect and find out the stressor and work on it. You should meditate before sleeping so that your mind is relaxed and away from the stress that you have experienced during the day. If it continues to bother you, consult a clinical psychologist for help.
Health Tips
exercise daily for an hour, meditation