Is there a reason every night I have dreams of different ways I die. It is really scary some times I wake up screaming, freaking out in pain, scared. I always have this feeling like I'm going to die soon.. Why is that! HELP! Please

That probably goes hand in hand with you're the problem you describe in your other question (about your heart problems). You should go see your doctor to determine what you really have to be able to stop worrying about it and/or get treatment