Shoulder arm still aching

Walao.... its been more than 4 days and my left shoulder arm is still aching. Yes, from my wifey's birthday where we went to Jusco and where I boxed my way at the game machine. Since then it has been aching and I can't even lift up more than 1kg of things without feeling the pain. The ache has gone down abit but it is still there. Praying that it will be better before end of this week.