What you are facing is something most of face at different times in our lives. If it is after a recent stressful event, then it may not require any treatment as such. If you have been experiencing it for a longer time then I suggest that you meet with a psychologist/ clinical counselor who after speaking with you can suggest what is best for you.
Next Steps
Meet a psychologist/ clinical counselor.
Health Tips
Do not self diagnose, or ignore the complaint if it has been there for more than a few weeks.