I keep thinking I'm going to have a heart attack and I havent been able to sleep all week. My symptoms every day have been: racing heart/palpitations, shortness of breath, feeling dizzy and lightheaded,  nausea, insomnia, irritability, some chest pain, mild ringing in ear, and now my head feels heavy. I did take a little nyquil bc thats all I have and I cant sleep but it just made my symptoms worse. I can't take it anymore. I'm so scared what if there's really something wrong with me and I die in my sleep or go into cardiac arrest. I feel like there's pressure being put on my head and im gonna pass out. I want to go to the ER but my parents are sleeping its 3 am I dont want to wake them up.  How do I know I'm not going to die  I just want to sleep