What a pain...

I pulled some muscles in my arm last night trying not to fall off of a truck. Went to the Mercy After Hours Clinic and was treated very well EXCEPT the shot to relieve the pain hurt more than the pain it was supposed to be relieving. X-rays showed nothing broken and I was sent home with prescriptions for steroids and a pain killer that starts with "L" and ends with "abs." Ended up getting a pretty good nights sleep with that stuff. I'm also under doctor's orders to rest all weekend. Whatever shall I do?