I'm having trouble getting to sleep due to my fear of dying in my sleep. I stay up to midnight or later just so I know that i made it to the next day and always very tired. Haven't been to the doctor in 4 years which makes fear worse. (Parents say i don't need to go to the doctor every year unless i really need to but i disagree). If my breathing ever feels off or if i feel a pain i don't understand it makes fear worse. Have any advice on how to overcome the fear???