I don't think this is related to an anxiety disorder, though no doubt it is causing you some anxiety. Your family physician should be able to determine the cause and be able to suggest a remedy.
I can't answer your question, Amiya. This is a forum for anxiety disorders and while your symptoms may result from stress, there are many possible physical causes too which need to be checked and ruled out.
Were the antibiot
always a good idea to get chestpain evaluated by a doctor.
If you are a healthy, young active person...?
Was it after you were driving...etc.
This might help you and your doctor figure out what is causing it. The upper rightchest...
pain in the right upper quadrant (under the ribs), even stuff that isn't typically associated w/pain... could actually irritate the liver capsule (causing right upper quadrant pain) and is then known as Fitz-Hugh...