I'm 26 year old female. Every time I sneeze I get a sharp pain on my upper left side just below my chest. Doesnt happen only when im sick.?

Pain with sneezing. Sudden, sharp pain in the rib area is possibly a strain of the intercostal muscles (muscles connecting two ribs) that can occur from the sudden forceful contraction during sneezing (or coughing). Another possibility is compression of a spinal nerve.