Hi,
Contact a Psychologist / cognitive behaviour therapist to assess the underlying causes.
Therapy and counselling will help you manage stress by identifying the triggers , by working with you to manage good sleep habits / sleep hygiene and other lifestyle changes required to cope with stress.
Cognitive behavioral therapy , the relaxation techniques will definitely reduce the causes. With therapy you will be well equipped to cope and improve your sleep by changing the ways of thinking that keep you from falling asleep.
Next Steps
Consult a Psychologist
Health Tips
Positive assertions, strengthening your body's association with the bed as a place you only sleep, get some exercise, try meditation or breathing exercises .