What can i do for shoulder pain?

Depends: For a shoulder injury, rest, ice, use a sling, tylenol (acetaminophen) or advil for pain. If related to heart/chest pain you need to go down to the emergency room.

Hard to say: Without more detail about your pain, what may have caused it and the dysfunction associated with it. Different types of pain have different causes and different treatments. It's very suboptimal for someone to give you a generic answer for shoulder pain without having a better understanding of what's causing it. An evaluation in person is necessary for appropriate guidance. Best of luck.