My pinky+ring fngr have been increasingly tingly/painfull since i hit my funny bone a week ago. should i worry?

i hit my funny bone on my left arm a couple times in a row last monday, fairly hard, and since then my left ring finger and pinky finger in particular have gone from tingly and numb-like to quite painful. it is difficult to open my hand fully with those fingers. it is even more difficult to grasp anything. my hand feels completely weak with the exception of my index finger and thumb. my middle finger felt fine until today, and now it too is starting to feel pain in the joints and limited in motion like the pinky and ring finger. my index finger and thumb feel fine, but the pain/pressure i feel in my others fingers seems to be increasing. is there anything i can do short of seeking medical attention for this? i do not have medical insurance and could not afford to pay out of pocket to have this looked at. does anybody know of this happening to someone they know? should i try to exercise that hand as much as possible to keep the muscles working, or should i just wrap it and leave it alone? soak it in warm or cold water maybe? any help at all would be appreciated. thanks everyone.