Hi, thanks for using healthcare magic
It is most likely related to your injury, trauma is the most common reason for pain in the joints.
Other causes of joint or 
muscle pain include :(1) infection- there would be associated fever, 
redness, swelling, warmth
(2)cancer- uncommon, does not develop acutely
(3)benign (non cancer) mass in the bones
You can consider the use of anti inflammatory pain medication along with warm compresses.
Anti inflammatory medication would consist of 
ibuprofen, 
naproxen or 
cataflam. One of these should be used regularly for at least a week, if the pain stops before this time, then it can be discontinued.
Warm compresses every few hours for 15 to 20 mins.
Restrict movement of the area as much as possible.
I hope this helps