I second what has been said: VERY doubtful, but you should definitely see a Dr. There are some pathogens which can thrive in 'bird dust' some of which MAY be able to cause such symptoms, however they are so rare there is a better chance of me winning the lottery than those organisms being present (and I don't even buy lottery tickets...) Some such organisms might more likely TRIGGER some other pre-existing conditions, perhaps another infection that your body was keeping at bay until the 'bird dust' organisms hassled your immune system. Again though all this is exceedingly unlikely but worth mentioning to your doctor.
I know some bird owners who would claim that having a bird leads to insanity, or perhaps that one must be a little nutty in the first place to get a bird....
Lastly I'm curious what you mean by 'cognitive problems' .... loud parrots can make it hard to concentrate, but thats very different than not being able to recognize family or not knowing one's own name.