Hi I Have Had Pain In My Back On The

Hi I have had pain in my back on the right side for about a week...it has gotten worst. I did go to an urgret care walk in they did a chest xray and it showed out of my 9 ribs they could only see 7. The pain in on my right side in back area. They could not diagnois me. Had no answer why only 7 ribs where showing. Any help I would appreciate.
Thank you Rosie

sorry I can not afford to pay for this,