Suggest Remedy For Pain And Soreness In Left Side Shoulder And Chest Area

I feel down and hit the ground hard and really hurt my right hand/wrist which is mending fine. My left side, my shoulder and especially my chest/breast area really hit hard. My shoulder is also mending but it is my chest/breast area that is really uncomfortable when I breathe and move my arms or get up from a seated position, etc. Did I strain/pull something in the area and would something like advil help or do you think it could be something more serious? I am a swimmer and I did take off for about 4 days and then swam a slow mile yesterday but it hurt and I was thinking it would perhaps stretch out the area but not sure if I should stop until this is totally free of discomfort?