I'm Trying To Determine If My Shoulder Injury Is Serious

I'm trying to determine if my shoulder injury is serious (surgery) or if it can be rehabbed. I've been lifting for the last few months and one day I started to feel bad pain in my shoulder. Enough to make me stop working out that day. That was last Friday. When I wake up in the morning it starts to hurt but after I get moving, the pain subsides. My shoulder has always clicked and it still does. Today I was throwing the ball with my dog and it starting hurting really bad after I stopped throwing it. The pain seems to be coming at the end of the throw, the end of the rotation. I haven't lost too much strength in it and naproxen helps... I'm wondering if the tear is really bad... I hate missing the gym but I know I need to figure it out before doing upper body.