Thanks for your question on Healthcare Magic. I can understand your concern. Sexual intercourse is considered as heavy exertion. So musculoskeletal pain is more likely for your chest pain during breathing. So avoid movements causing pain. Avoid sudden jerky movements of chest. Avoid heavyweight lifting and strenuous exercise. Take simple painkiller like paracetamol or ibuprofen. Apply warm water pad on affected areas of chest. Don t worry, you will be alright with all these in 2-3 days. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.