Thanks for your question on Healthcare Magic. 
I can understand your concern. 
Yes, you are right. You are too young to have heart diseases or other serious illnesses. 
Possibility of 
musculoskeletal pain is more. 
So follow these steps for better symptomatic relief in musculoskeletal pain. 
1. Avoid movements causing pain. 
2. Avoid heavyweight lifting and strenuous exercise. 
3. Avoid bad postures in sleep. 
4. Apply warm water pad on affected areas. 
5. Sit with proper back and chest support. 
6. Take painkiller like 
ibuprofen. 
Don't worry, you will be alright with all these. 
If not improving with all these after 1 week then 
consult doctor. 
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.