I skipped my period. why?!

I skipped my period. why?

last month, i didnt get my period at all and now i got it and its perfectly fine. do i need to be worried? oh, btw, i cant be pregnant. so, any other possibilities? do i need to go to a doctor? is this normal? am i a freak?

3 weeks ago
im 13. it started when i was 12.

You are young. Your cycle is still normalizing. (Every woman misses at least one period in her life for no apparent reason). Don't worry. It is completly normal.