Why do i have extreme dizziness and heart palpitations!?

Vertigo?: The spinning sensation is called vertigo. Causes are either from ear or brain or side effect of drugs. If it occurs when lying still in bed, it is probably due to a disturbance in the brain. Pure vertigo is very rarely a seizure. More often it is due to poor blood flow to the back of the brain. Heart and blood pressure problems need to be considered. Migraine may be cause if rest is fine.

Few possibilities: You are very young but need more histiry like do u have any shortness of breath, dizziness is associate with nausea/vomiting, head ache, any chest apin in addn. To palpitations and dizziness. Need to r/o anemia, extreme anxiety, chornically low BP when heart beats faxt to compensate, r/o thyroid problems. Also need to r/o cardiac codn. For which you need to be examined by ur dr for ekg, echo etc.