I never had a major back problem; I've always been active and did plenty of sports when I was younger, but I was lucky not to have any accident or symptoms related to my back. That good luck apparently changed last December '11 when I (38 y.o. male) was carrying something heavy on my right shoulder, and turned right fast. I felt something in about the middle of my upper back sort of pulling. After I finished what I was doing I had a strange sensation on my neck (it hurt to lean my head over). Over the next few days I started experiencing symptoms such as numbness (right arm, early in the morning, especially when sitting down straight away after waking up), tingling (both legs, especially closer to my feet), and mild pain (back of neck, middle-upper back, right arm). My physio said it was most likely a pulled, sore muscle or tendon. The pain was eventually gone but the numbness and tingling stayed, less frequently though.
Could this problem be caused by a herniated or bulging disc, or the physio is most likely right?
Last week I was doing some workout and the same pain was back after doing some pushups (which I had avoided since then, just to stay safe), so I have all the same symptoms again.