Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of
musculoskeletal pain is more.
But better to rule out heart related diseases first because left sided
chest discomfort is common in these diseases.
So get done ecg and 2d echo.
If all these are normal then no need to worry for heart diseases.
Musculoskeletal pain is more likely.
So apply warm water pad on affected areas.
Take painkiller and
muscle relaxant drug.
Avoid movements causing pain. Avoid heavyweight lifting and strenuous exercise.
Avoid bad postures in sleep.
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.