Thank you for posting your query.
First of all, I would like to reassure you that your problem can be completely solved with proper treatment.
You need to consult a psychologist/psychiatrist
for the treatment of excessive thinking.
For relief of headache, you could benefit from medications such as amitriptyline
or dothiepin, which would also help in treating mild depression
I hope my answer helps. Please get back if you have any follow up queries or if you require any additional information.
Wishing you good health,
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad, India
Click on this link to ask me a DIRECT QUERY: http://bit.ly/Dr-Sudhir-kumar
My BLOG: http://bestneurodoctor.blogspot.in