I suffer from irregular heartbeats, severe headache in back side of head..a state of fear?

My name is (…) my age is 21 years..my weight is 48 kgs..From few weeks i experience something strange ..suddenly irregular heartbeats,severe headache in back side of head..a state of fear.hot face and ears.i want to cry that time..weakness.i have fear of death..but after sometime i get fine

Age: 21
Female
Medications: nothing