Could you explain further? Do you get periodic blurry vision followed when it subsides with the head pressure? It sounds like a migraine related condition, which is vascular in nature. It can often accompany anxiety, as blood vessels contract and expand when we get stressed and then relax and can drive the blood to the head when the vessels start to open up again.
Hi,
Yes, I've experienced the head pressure and vision problems; I have had anxiety and menieres disease ( an inner ear issue) for many years. Although I was not taking medication at the time for any of my health problems. What helped a lot was a change in my daily diet and therapy regarding the anxiety. Anxiety often times coincides with other health issue, so maybe it is worth it for you to see another doctor for a second opinion, such as an ENT who could help you possibly get to the root of the head pressure... Also look into a CT scan and/or MRI, unless you've already done so...
Good Luck