Don't worry, guys. The it happened to me at 17 also, exactly the same thing, i felt actually like committing suicide cause i though i would soon loose my mind. Anyway, i wrote like two pages of my story on another form which i am not going to do here, cause the answer is it will go away, just STOP stressing and change your life style. Take a vacation. That is what i did, and i am 24 now, and i've never had this problem since i was 17 ( It began at 17 and troubled me for 6 months, approximately i experienced 5 attacks. )
God bless,