Im so confused, someone please give me an answer!!?

So a lot of my family have died and i think im being a little paranoid because they have all died in the past 6 months and i feel like i have to do something great or big and have to be remembered by thousands and become a big musician(music is my passion) before i die and im super paranoid. Everyday my chest hurts really bad (emotionally) like i have to hurry because my days are numbered but its hard to do what i think i need to do when youre just a freshman in highschool. I have to go to thousands of concerts and if i dont become a huge musician(rock or punk) then I'll die a failure and not a lot of oeople will miss me and i dont want to be just another person in a cemetery that people drive by on the highway. I want to be different and i feel like im 14 and trying to find out the meaning of life! I try to just live life as it is and not worry about it but its always in the back of my mind and it always comes up. And its giving me really bad stress and i cant sleep at night. HELP!