Hi.
Thanks for your query.
Noted your history of persistent pain in the ears. 
Since you are getting the pain even on exposure to 
hydrogen peroxide, swimming, ear phones the cause is obvious. 
This is enhanced 
sensory system response, it is possible that there is a granuloma in the ear canal. 
Another reason is possibly you might have suffered from 
Herpes zoster in past and this is now post-herpetic neuralgia. 
I would advise you the following:
MRI of the brain and ears to rule out any tumor. 
Clinical evaluation by an ENT and 
Neurologist . 
Trying the medicines like Amitryptiline, tegrotol or gabapentin underr the guidance and increasing dosages of the Doctor can help you the most. 
All these are prescription medicines hence you have to have a prescription. 
You can also try alternative methods like acupressure, 
meditation etc.