I literally haven't remembered a dream since 2008, is this normal?

2 years is a really ong time to not remember a dream. when i was younger i used to get night terrors, and my therapist told me i should write all my dreams down. the last dream entry i had was on May 14, 2008. i'm just wondering if this is really abnormal? why am i not remembering my dreams? because i bet they're really good!