When you got your VCAA letter did it list each and every disability you are claiming? If you get a decision consider any claim not denied,deferred or approved to have been denied. You should file a NOD on all the issues no matter what rating you get. When you claim a condition you have to have a clear diagnosis for it. Back pain is not a diagnosis. Just keep all these things on appeal while you learn the ins and outs of this system. You are in the world of the VA now and there is no timeline. The VA is immortal and you and I are not.