Thank you for asking. I can understand the distress you are through. Your complaints are suggestive of an anxiety problem. Most probably a general anxiety condition. Overthinking on trivial issues, constantly worrying, not able to relax, fatigue, body ache, etc are some of its characteristics symptoms. For management, a detailed knowledge about the problem is required.
Next Steps
Kindly consult with a psychiatrist. You can ask a detailed query here on practo or visit one nearby you.
Health Tips
Don't worry. It is a condition that can be cured. A timely consultation can prevent further problems and improve you quality of life.