Awhile back I noticed a sharp stinging/tingling pain in my back. Left trap to be specific. It would only happen during shrugs and Squats. I have managed to stop doing those two workouts, and I never feel that sharp stinging. Only thing is now there is a slight pain and numb feeling almost 24/7. A couple days after I do chest it actually kinda hurts. Any thoughts or advice on this would be greatly appreciated.