Relax, no worries for heart problem.
I went through the query and understood your concern.
Be relaxed. As your ekg, chest x ray, blood work normal suggest your heart and vascular system (CVS) is normal. To support this your my family has good health.
Cardiac problem at your age is very less in normal active individual.
The symptoms of chest, shoulder, neck pain
may be due to other conditions like dehydration
, general weakness or due to viral infection.
Have good hydration, regular exercise and good nutritious food.
A NSAID like Ibuprofen or aceclofenac
with a muscle relaxant
twice daily for 2-3 days with good nutrition and exercise will help you.
Hope this information help you.
Feel free to ask if you have any further concerns, I will be glad to assist you.
Wish you good health.