I Have A Pressure In My Forehead Internally For Many

I have a pressure in my forehead internally for many years. I have had CT scans and MRI's etc but no sign of any kind of tumor, brain damage, lesions. It started with menopause and a complete break down in the early 80's. No one has been able to help me. I feel it is stress but have eliminated most of the major stresses in y life. How do I know it is not dementia or something?
the pressure happens when I try too remember things, or am over tired or am asked a direct question.