It might be Carpal... I've had the twinges of it before. When I feel the beginnings of it, then I start to exercise the wrist in non-repetitive ways and vary my typing styles. I also keep an eye on how hard I hit the keys, specially the space bar which is the thumb. That's the digit that seems to take the brunt of my abuse.
It's a bit better this morning, which means I'm on the right tack. Looking forward to seeing you!