Is the pain worse if you take a deep breath?
Are you short of breath?
How long do the pains last when you get them?
Anything seem to bring them on?
Anything make the pain worse?
There are lots of possible causes for chest pain - soft tissue pain , joint pain , esophageal problems and cardiac problems ( such as inflammation in the tissues around the heart.)
Given your young age a serious problem is unlikely but chest pains generally do merit a proper assessment by a Dr.
I suggest that you arrange a check up - today if possible.
Nothing special to tell him.
He or she will need to take a full history and do a thorough exam - further tests may be needed depending on the findings.