I almost forgot...this technique always works for me when I can't afford a doctor...
Stand in the middle of the room, or outside next to your house.
Next, pause for half a second to think about how much you really, really, really wish your arm didn't hurt anymore.
Then, move yourself at a rapid pace towards the nearest wall. I've found that running at top speed works real well. After you get there, slam your shoulder into the wall with as much force as you can muster. Expect to black out for an hour or so, that's normal. It's just, y'know, your body healing itself and all that.
After you come to, your arm should be all better!
.....or you may need to go to the ER. Either, way, your arm will get fixed, no doubt about it! Hope I helped!
~JM