I have a burning sensation and pain that feels almost like a pulled muscle on the right side of my chest. What could be some of the possibilities? Thx

Have it looked at. While a pulled pectoral muscle may cause pain and abnormal sensation, it's important to have it looked at to make sure it's not from an underlying cardiac condition. One differentiating factor is the muscle pain is oftentimes reproducible - if you push on it, it will hurt more - whereas cardiac pain may not be. However, without knowing further details - it's importan to see your internist/fp soon.