When did you start forgetting?

my problem is that i can never remember if im 37 or 38, this has just started happening to me since my last birthday. i will also ask my fiance the same question over and over about 5 to 10 minutes apart and never really listen to the answer until the yelling starts.i cant remember what i had for dinner last night, but strangely,i can remember things from 20 years ago.