One rib cage looks a different shape to the other side

you should remember that, even if we had some physicians on board, they would not give assessments on a web site. They would probably direct you to make an appointment with a physician who is at a brick and mortar office.
(E-diagnosis may be in our futures but it aint here now)

What farmerman said. If you have a medical problem please go see a physician.

Free medical advice, like free legal advice, is worth every penny you spent for it.

Very few of us are perfectly symmetrical. My short leg means if I meander I walk in circles.