Hi there! Today, while in the gym, I was doing overhead dumbbell presses with heavy weight when I heard and felt a loud pop in my left shoulder. After setting the weights back down, I clutched that shoulder and I felt a second pop. I ve felt some numbness in my left arm and dull pain in my side deltoid area since about an hour ago, when it occurred. Can you tell me what kind of injury occurred, and how I can treat it?