Hi welcome to the health care magic As left sided chest pain is since one month, I prefer to investigate you with EKG, chest x ray, Auscultation and echocardiography if needed (EKG for rule out cardiac cause and x ray rule out costochondritis and respiratory cause if present) If no organic cause present then it can be considered as musculoskeletal pain For that ibuprofen prescribed for five days. Hot compress helpful Physiotherapy beneficial Avoid strenous activities for few days Avoid heavy weight lifting Take care Hope your concern solved Consult pulmonologist for examination and discuss all these