I think I jammed my finger yesterday. I was tucking in my shirt and heard a pop, and then felt sharp pain in my index finger. Looking at it I noticed the top knuckle is bent in the direction it should bend at about a 45 deg. angle, but it will not straighten. It stays bent at 45 deg. even if I try to straighten out my finger. There isn't a lot of pain. It was numb last night and is still not 100%. The only pain and swelling are actually on the middle knuckle. What should I do?