Hello @rfhami and welcome to Connect. I can certainly understand your concern and discomfort of pressure and tinnitus in your ear. I have had similar symptoms for a number of years.

You say that doctors have done a lot of tests. Has that included a brain MRI focusing on the auditory canal? If not, you might want to request that test. What about a hearing test by a certified audiologist?

We have some discussions on Connect on this topic. I would encourage you to read the posts in these discussions get to know others who have experienced pressure and noises. Here are some links:
--Tinnitus
https://connect.mayoclinic.org/discussion/tinnitis/
--Ear Tinnitus and Pain with Neuropathy
https://connect.mayoclinic.org/discussion/ear-tinnitus-and-pain-with-neuropathy/
Is this pressure/tinnitus one-sided or on both sides? How long has this been a problem? Did you have any injuries or upper respiratory infections prior to the start of these symptoms? Also, is the tinnitus a high-pitched sound or does it pulsate? (I ask these questions so that I can introduce you to others on Connect who have similar symptoms.)