Definitely get it checked out, knowing whats up will help you feel a bit better.
I was having chest pains for over a year (still happens sometimes), starting when I was 18--I was/am a healthy thin active person then and now...they'd be every few days, could last for a while or a little, and yes the heart beats faster/stronger when you feel it because feeling the pain or worrying may make you more anxious...
I went to my family doctor and a cardiologist--and then did blood tests, EKG, echocardiogram
, and a stress
test--all great things to determine problems. All of my tests came back clear, which indicated that it was not a heart problem. They suggested stress--now personally, I didn't feel too stressed--but stress can affect your body without you realizing it, and when I started paying attention more, that seemed to be the problem. Also--after the doctors told me it wasn't my heart or any other health problems like that, the pain happened so much less (relief, less stress I guess!).
So definitely get it checked out to make sure it's no big problem, and you'll feel a lot better knowing what is happening, too! Good luck!