Really strange! That rules out what I was thinking (had a friend that had something like this)..
You may have to check with a doctor, and get some exrays, could even be arthritis! Its not totally unheard of to start getting arthritis in hands and fingers at your age.
Not sure, really.
I can tell you I played 12 years ago A LOT but then was in a car accident and couldnt play for 7 years, and when I started again, my hands and fingers hurt. But they would usually start hurting a few hours after the round and be okay by the morning. It wasnt painful enough not to play. After a few weeks, apparantly my hands and fingers got used to the "work" again, and it stopped all together.
Good luck figuring it out, though!