Thanks for your question on Healthcare Magic. I can understand your concern. In my opinion, we should rule out lung infection because it can cause chest pain on breathing and phlegm. So get done chest x ray. If chest x ray is normal then no need to worry for lung infection. Sometimes simple musculoskeletal pain can cause similar kind of chest pain. So take simple painkiller like paracetamol or ibuprofen. Apply warm water pad on affected areas of chest. Avoid movements causing pain. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.