My arm really hurts between my elbow in shoulder, right in the middle. I was using light rackets, like a Flexpoint. Then, I switched to a 1HBH, and decided to try a wilson ncode 90. Now I have those pains there. Is it from the racket you think? Or from the 1HBH. I think it is from the racket because I was not used to the weight, but what do you guys think?