Is it normal to experience "brain fog" after rhinoplasty? I had rhinoplasty yesterday.

It has now been over 24 hours since my operation. I am not taking any major pain pills (only extra strength tylenol). I find myself having difficulty recalling some phrases and accurately reading numbers, though my ability to read literature seems unaffected. Is it normal to experience some "brain fog" for several days after rhinoplasty? I know that anesthesia, lack of sleep, and the trauma of surgery can adversely affect cognition, but I'm hoping it's temporary.