[dcg1952]

elliskit,
Another thought would be that you might have injured one of the small bones in the wrist (the carpal bones). The area you have described is where the hamate bone is located and I know some golfers who have injured this. This bone has a small hook on it. I wonder if you have tenderness in the area where you are feeling the pain while swinging the club???? If so, you may need an xray to see if you fractured the hook of the hamate. And I love Ben Doyle's video, but when I see him hit the tire I cringe!
My 2 cents---rest it for a week and if pain returns with taking even slow practice swings, I would head for your doctor and get evaluated for either a hand/wrist problem or pain referred from the neck (see Vickie's post). Good luck. Let us know how it turns out. Dr Dave