Shoulder Trouble

The last few days when I throw my shoulder feels like it is almost popping outof place. It is never sore when I’m not throwing it just hurts a bit when release the ball and it feels as if 2 bones in my shoudler are cashing or something
does anyone know what this could be or if it is bad or not, I can throw fine when change my arm action but when I take my usual arm action this happens

Definitely get your shoulder checked out by a doctor - preferably a sports doctor.