Neurocardiogenic syncope? or worse heart problem?

okay, well im 15, a guy, in great shape, eat healthy, and i have neurocardiogenic syncope. ive had it for about a year and ive been pretty much symptom free for, well about a year. i caught it at an early stage and i started meds rright away. but lately ive been feeling weak, light headed somtimes, and ive been tired alot. i get 10 hours of sleep though. so i have no idea why this is. ive also been getting alot of headaches lately. not terrible ones, just ones tht become a nuisance. i run 3-4 miles a day and bench and workout daily. so its not like im in bad shape. anyone have any ideas? and by the way my parents DO know about this and they will take me to my cardiologist if it continues. im just trying to maybe get some ideas beforehand. thanks