to start off not sure why this all started, but it just did. A year or two ago idk why but i started paying attention to my heart beat. The first year wasn't bad but this year has been awful, i have been experiencing Heart stings, palpitations, shortness of breath and Low heart rate (which usually causes me to panic). I am 16 and i swim every day for 2 hours, eat healthy, and only drugs/medication i have ever taken is vyvanse for Adhd. I have told my parents about me feeling like my heart beat is low/weak and that i get dizzy and anxious from it, so i got a EKG done. (came back normal) Im not sure what to do, im pretty sure its all in my head but it stresses me out and i just want to know if anyone else has had this issue and what you did to fix it.