Hi Lobbert
My friend once fell out of the coach on her way back from the races at Ascot, (she may have overindulged in the fizzy plonk) her hand was swollen and she could move all her fingers but it hurt. She worked behind a bar all the weekend pulling pints etc before finally giving in and going to the hospital on the Monday. She had broken two bones in her hand and the doc said her pain threshold must have been really high (personally I think she was just numbing the pain with alcohol)
Anyway the point of this long ramble is... you could have broken a bone or two, just because you can move your fingers doesn't mean its not broken. Get an x-ray soon. Even if you end up with a cast it shouldn't stop you having fun at the festival.
x