I have to FORCE myself to remember that not all of the cognitive stuff is MS. Everybody occasionally walks into a room and can't remember why, or suddenly can't remember a name or number you've known forever.
I have the brain freeze sometimes, but especially under stress. Someone would come into the Post Office and say, "Can I send this can of Spam via insured mail to Botswana?" and suddenly I couldn't even think where or how to find the answer. The person might have well have been speaking Martian.
What really upsets me is drawing a blank on an entire scenario...back to the Post Office again: someone would walk in and say, "We got the results back!" and I'd be totally blank, no idea what she was talking about. A biopsy? Pregnancy test? Application for a mortgage? And it wouldn't be some minor thing; it would be a major life event, and the person would have been SHOCKED to think I "forgot".
I got pretty good at faking my way through the freezes and blanks, but sometimes I was trapped. Boooo.