im 14 years old and very active. i notice lately my heart is skipping beats or racing real bad when i do something little. like speeding to a class and im huffing and puffing when i get there. other symptoms are, drowsyness, musle pains, joint pains, and when im cold my skin is hot
Heart problems and cancer have nothing in common and neither are likely at your age. Tell your mom about it.
it can be anxiety...but you should tell your doctor about this
the best thing I can recommend is a doctor. I hope you get better soon ;)