Hey Josh ..
It's nothing to worry about too much, you may be right, it could be a growing pain, or you may have just trapped a nerve, which sent a shooting pain ...... are you still having these pains ...
To help, cool the area down, get some ice, wrap it up in a tea towel or get an Ice pack, and hold it against the area that is hurting for a few minutes and try and do gentle excersises and stretches, but if you are still really worried, then tell your parents and ask them to take you to a doctor.
Growing pains are painful, but it will get better ...
Loads of hugs
Ginger