The pain you describe sounds very much like pain of the chest wall that includes the ribs, muscles, cartilage, intercostal ligaments and nerves. That is it does not sound like pain from the pleura, lung or any of the underlying organs.
The new class of drugs was known as beta-lactamase inhibitors and they worked to block the ability of the S. aureus bacteria to destroy the distinctive penicillin ring structure. The new combination drugs that are effective against Staphylococcus aureus infections are amoxicillin/clauvulante, ampicillin/sublactam, piperacillin/tazobactam and ticarcillin/clavulanate.
The best-known member of the staphylococcus family is Staphylococcus aureus. A drug resistant form of Staphylococcus aureus is called MRSA (methicillin resistant Staph. aureus). Staphylococci are the main culprits in hospital-acquired infections, and they cause thousands of deaths every year.