Hi, I am Syed, 28 years old. Two days back after i wakeup i for sudden Dizzy and jittery, immediately i went to hospital, there they taken ECG (normal they said) urine test (normal they said), BP (normal), heart beat normal, blood test said normal, xray found normal. they gave me a injection and i feel better. but yesterday night i got again sudden dizzy and juttery and i scared, i dont know what happens to me.. It might be symptoms of cholesterol or thyroid ? please advice...