Have i ruined my hand?

Kso, Yesterday i slammed two of my fingers in a door i lost some feeling in one finger and had all sorts of weird pains in my forearm today i can not lift any thing heavy with that one hand, like a plate or a laptop. The hand kind of has a tingly sensation, and there is a light bruise around the first knuckle, i dont want to go to the doctors if its nothing serious, thanks for your input!!