Hi... Start taking Counselling Sessions on weekly basis to address your overthinking issues. Some thoughts and emotions are being accumulated and they bring you down in the morning time as that is the time when your mind is coming out from subconscious to conscious. Overthinking is just a symptom, you need to address the cause of it.
Next Steps
Consult a Psychologist.
CBT along with Lifestyle Changes and Interpersonal Guidance and Counselling is required.
Health Tips
Mr. Gunjan Maithil
Senior Psychologist
Cell: nine six seven one three zero three one three four
Website: https://gunjanmaithil.wixsite.com/therapy
App: http://wix.to/fECHB08?ref=cl