Yes. It's quite likely that the pain would just come and goes...
If it doesn't, then you're probably having quite a serious case...
Anyway, do your family have any history of cardiac disease?
Restless is probably a psychological effect then a direct
one...
The pain could be caused mainly because of stress... It could also
be an elevated or triggered symptom brought about by stress if you
have hidden cardiac diseases... If I'm not wrong, the males
population generally have a higher chance of getting genetic heart
problem down their family tree... And you're still quite young...
So you shouldn't worry yourself unnecessarily? At your age, it
probably won't be anything too serious which could bother you too
much....
Try to have enough rest and sleep... Keep your mind relaxed as
stress is not only known to trigger cardiac diseases but other
complications too?
If it really worries you so much, go see a doctor... And as I've
mentioned earlier... Get a specialist followed by a proper check
up... Try to get a 2D echo done at least for a start...?