Dull pain right side only hurts when I sneeze or cough.

Hey all, I am a 33 year old male and for about a month I have had this dull pain on my right side underneath the ribcage. It mainly only hurts when I sneeze or cough and sometimes if I stretch a certain way. It's not even a severe pain, just enough to be agitating. When I lay on my back and push around I can't feel anything or find anywhere that actually hurts, so I dunno. Any help on what this could be would be appreciated. I have heard that you can tear your intercostal muscle if you sneeze to hard or cough so maybe that could be the cause??