I'M SO AFFRAID OF DYING, IT'S NOT EVEN FUNNY.?

I'm thirteen years old, and death is always on my mind. I'm always paranoid about the slightest things. I always think i'm going to end up dieing somehow. and I get scared of every little thing. Everyone obviously knows about the 2009 H1N1 right? Well, I have three of the symptoms, but the headache, could be from my period i just got. and my congestion and soar throat could be from my allergies. but i'm just so scared that i just break down crying thinking that i'm going to die from swine flu. Anything just always makes me ask "Am i going to die"? and my mom tells me everything's gonna be ok, that she'd never let anything happen to me because i'm her miracle baby, but i'm just so scared and i end up crying over it, like i am right now. I'm so paranoid and i cry on a daily basis. I don't think i have swine, but if i knew i didnt i'd be so much happier in stead of worrying so much over it. and the thing is i'm affraid of the doctors, im just afraid of everything and im sick of it. i jst wanna live my life, its so overwhelming, please help ):