Need doctor or surgeons help pleas?

Ok i get pressure in my head i cant go to the dentist bcuz ill get mive pressure in my head and i feel like ima p out! Another few symptom's i get shaky sometimes my heart skip's beat's. Expertlyen i bend over and breath in. If i try riding my bike or run ill get mive throbbing in my head. And my dentist said something about (CHF) A.K.A. Congested Heart Failer but im only 16 is it possible i have heart failer! and i sleep with alot of pillow's if i do got heart failer what are they gonna do?