Im a 17 year old female and i started my period when i was 13. Not to long ago i went to travel with my family. I was expecting my period the week after we arrived so i wasn't really worried. When the day came for my period to come it didn't I was shock cause that never happen to me before and i knew i couldn't be pregnant because i never had sex so i went on the internet hoping to find an answer i read that traveling can affect periods so i was relieved that it wasn't nothing serious but the same night i got cramps nothing too serious when i am on my period but i found no signs of blood now lately i been finding brown discharge now im really confused. Do you guys know what's going? on or should i been concerned and go to the doctor. Thank you.