I've been getting a slight click in my left elbow that has been there for a while. It usually goes away when I change my pushup etc position, but these last couple of sessions it's just become more pronounced and actually started to feel painful. It's right in the core of my elbow, so I'm not sure what to make of it? For curls or rows for instance it feels great and doesn't make any noise, but for tricep presses, pushups or sometimes dips it plays up. What do you guys think?