Paranoid? I'm not sure

for about four days now I've been sick to my stomach. I keep getting this feeling that something really really bad is going to happen. and everyday it gets worse and worse. today I've felt like I'm going to puke at any moment. I kinda feel like I'm just being paranoid, but this feeling in my gut tells me otherwise... I don't know what to do. I dont want anything bad to happen, but I can't stop it if I don't know what's going to happen. and even if I did know how could I stop it? for some odd reason I get the feeling someone's going to die... not sure why really. my friends just say it's too much sugar and not enough sleep, I think it's much much more than that...