[st dogstar] you're bound to feel rather adrift - even after 5 years of freelancing I still experience those feelings on a regular basis but have learned to go with the flow. Mind you, like Mr Micawber, I always believe that something will turn up.
On a more serious note, I've had perfect pitch since I could ever remember, both in the absolute sense and the relative sense. So I have very little trouble transposing at sight, as well as playing at sight, or keeping in tune when singing a song in different keys. I've never known how I do it - I also have a pretty fast learning memory for music too. But, oddly enough, I'm lousy at matching names to faces.