Last week my shoulder started giving me pains. I took about a week off, it was feeling pretty good so I benched today. First rep came down and it hurt like hell. It cracked or made a popping sound a few times, but it only really hurts when i raise it and bring it forward, really bad now, when im not lifting anything. Any ideas what it could be, or what I should do? (obviously take some time off, which ill be doing)