If you can't remember when you had your last tetanus shot then you're probably due for one anyway. You will probably need the finger xrayed to see if you need to splint it. My 15-year-old son is coming up on the last two weeks (of six) of wearing a plastic splint on a finger he jammed when playing a game with a hard ball. Broke a corner of the bone next to the joint and a tendon pulls it if it isn't confined in one flat out position to let the bone heal. You're in the unfortunate position of dealing with at least three different issues simultaneously and you would be wise to let a doctor take a look at it.

Good luck!

SRS