It's only the left one, it's only a little painful but it's definately doesn't feel right, I'm pretty sure it's the rotator cuff, it feels like a bone in the shoulder. It's really annoying because I really don't wanna mess anything up but shoulder press is really an exercise I want to carry on! I tried doing some rotator cuff exercises with a light dumbell, maybe it was to light? Or maybe it was just crap, any help please?