hi,, people with hyperthyroidism
can have increased hear beats and palpitations.check out for other signs of thyroid disorders. chest pain
in this age may not be due to heart problems, it may just be a stomach pain.. anyhow the rapid heart rate
and variations in rhythm you are complaining may prompt any treating doctor to go and look out for an e.k.g (e.c.g).teens usually face such problem.. i think chances of having something wrong with your body is less. dont worry.