Stop trying to self diagnose.

MCI vs dementia???? What is that?

I have some severe cognitive impairments. I've had problems for 50 years. Life goes on. I lived a full life until the last 10 years when I had to slow down in some areas.

I think you are your own worst enemy. Your PCS is just a small part of your problems. You over analyze yourself and create bigger problems.

Let the professionals assess you. If you try to force the tests, they will show you are not responding naturally and the results will be in doubt.