Iffy shoulders seem to be one of the more common problems with athletes today. =\ I still think you should have it checked. Lots of major injuries happen because they are simply ignored in their earlier stages. And while they may never be as strong as they are before injury, you can always get them pretty damn close to injury. If you know what to do (and oftentimes, you'll need to go to farther than the regular physician. Some are just in it for the money and their methods might actually be more detrimental), you can escape what people always claim as the residual weaknesses, which I think is usually a product of their simply letting it be and accepting it. Hope you recover well, man!