What to do for possible broken finger?

I shut it in the door which made it hurt, but didn;t think anything of it, then i was nailing something in my wall and i hit my finger with the hamer.. really hard at the same spot where I shut my finger in the door. When i run my other finger over my injured one i feel a bump then my knuckle. Its swollen and red, but not bruised. I have movement of my knuckle above the injury but barely any and it hurts to movr and i have movement below it, but that also hurts my finger.. Gahh
Help?
I took a peice of cardboard and an elastic spots wrap i have and put it on my finger to stableize it untill i figure out what to do.. Iceing and elevateing. WHat else?

I took my dog out for a walk and had her leash wrapped around my fingers, well, she seen another dog and pulled really hard, my ring finger was bruised and turned black and blue and hurt really bad. I went to a Dr. after a month and it was broke on the first knuckle and fractured before the knuckle, it is crooked but I waited too long to have 2 pins put in it( Dr. told me).
So he told me to tape it to the next finger to keep it stable so try that. It's been 6 months and it still hurts once and a while but use some medical tape and tape it to next finger it helps.

put ice on it
if it doesnt feel better massage
it slowly and carefully
if u make no progress within 2 days
go see ur doctor
good luck!

Ice for 20 min at a time, no longer or you get the reverse effect. Next do what a dr would do, tape it to the finger next to it to give it support and protection. Try some white willow bark for the pain and inflammation, it works great and is all natural. Get well soon.

Motrin for pain, splinting...but don't splint your finger straight out, it needs to be curled slightly like you are holding a can of cola.
If no improvement in 5 days, time to visit the doc and have it x-rayed.

ice, elevate, and tape... it's always good to consult a doc...:

my story is: i broke my three fingers on my dominant hand <middle, ring, and pinky>. my specialist told me "cast for one month, splint for 1 month." Exactly one year after that happened, we were throwing a nerf ball around, it bent my pinky back and broke it again.

What the doc will do, and u can do this with a friend:
have your friend stick out a finger. With your "broken finger" try to push down on their finger. <i was able to do it with my broken finger, but only a little>. Then try to press their finger up. <i had no success.> They took an x-ray and told me my finger was broke. Good Luck!

If it is anything more important than a pinky, please go to the doc. If u are young: any finger... they are all important.