Personally, I am not scared of dying at all. I almost look foward to the day I die in a way, because I am secure enough in my faith to knoiw that when I die, I will be free, and with God.
I don't know, sometimes I get this weird feeling that I will be dead by or before I turn 30. I know, I know, that's weird or stupid or whatever, but it happens. I get a random feeling from time to time. It's creepy...
About the medication, you should see your doctor, and maybe he can give you something or refer you to a psychiatrist. Just ask him.

Good luck man!