I suffer from insomnia for a month. I am scared I might have sporadic fatal insomnia. I take 100mg Zoloft (sertraline) bc of anxiety. I am 16.

WhereDid you hear it. Where did you get that diagnostic label? Lots of people have insomnia now and then and i respect that it's not pleasant. Sounds like your anxiety might be the bigger issue. Please consider getting some help from a clinical psychologist so you can sleep better and have peace of mind. The very best to you.