Bruce,
I'm no knifemaker but I hope you will ice that finger regularly for the first 48 hours, and even through to the first week since the trauma. If it doesn't improve, please, please see a doctor to get it looked at. It's quite difficult to diagnose what the extent of trauma is w/o seeing it in pictures or in person. Swollen n bent probably means the tendons got injured - the curled up position is basically your body trying to avoid pain. Your bones probably had a good knocking too - depending on trauma, could have hairline fissures.
Times are really tight now, I can understand if we choose to self-medicate. Personally I'm in that position myself and can't afford my bp pills BUT I wouldn't hesitate if it involved my hands, if I were a knifemaker.
(actually, just as a thought - why is it that there are no doctors who will offer "free" medical service to those of us who are really broke? it's always $ immediately after treatment! all other professionals bill you later...)
Take care,
spyken