I feel really faint, and my heartbeat seems weak at night when I try to sleep. Hello. I m fourteen years of age, and on Wednesday night I started to feel really panicky. When I got to bed I started to get worse, and I found that I couldn t lay down because my heart would feel as if it was gonna stop. Also, all day today (and all Wednesday night) I ve been feeling really weak, and my heartbeat feels faint, but moreso at night. I m just really worried that this is something serious. I know I ll sound really stupid for saying this, but I feel like I m going to die, and neither of my parents will believe me.