yesterday when out walking i developed seriouse chest pain, which made speaking and breathing incredibly dificult. the pain as of today has been reduced but i feel like the internals of the left hand side of my chest are loose. i can hear a grinding gurgling sound if i bounce on my toes (not jumping) which also makes me very breathless, and causes me to cough, i am 29 year old male, who is active in running and cycling.
Thanks for your question on Chat Doctor. I can understand your concern. Possibility of musculoskeletal pain is more because you are young, active, so heart related diseases are unlikely in your case. But to stay at safer side, better to get done ECG to rule out heart diseases. If ECG is normal then no need to worry about heart diseases. Musculoskeletal pain is more likely. So avoid movements causing pain. Avoid heavyweight lifting and strenuous exercise. Avoid bad postures in sleep. Take painkiller and muscle relaxant Chat Doctor.  Apply warm water pad on affected areas. Don't worry, you will be alright with all these things. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.