This sounds like a delayed reaction to the original injury hun. I hope you will seek medical advice on this before it gets any worse & affects your work as well as your art *hugs* feel better soon.

*hugs back* Nah. Ive had it for yearsssss. I picked up a box tonight and I think I pulled something and made the injury worse. No reason to go see a doctor. It'll heal up by itself, or at least go back to only hurting every once in a while