Is my finger sprained or broken?

I know it's a stupid question over the internet but I wonder if there are any tell-tale signs of this. Yesterday I was playing around with my friend in the kitchen and I hit my right pinky (that got surgically put back together from another incident 7 years ago) really hard and I saw a blood vessel or ligament pop out and swell up and it hurt to bend my pinky so I haven't tried bending it all the way. It hurt all day today too. I don't want to get it checked out because I'm afraid it'll be pointless. So does anyone have experience with this kind of stuff? Will it heal on its own?