How can i delay/quicken my period?

there is no healthy way to delay or quicken your period. if you were on the pill you could skip the placebos and continue on to the next pack. i would suggest tampons so you can still swim. but eating less does not work unless you are EXTREMELY under weight then you body will stop your cycle to help the unnecessary lose of sustenance. i would talk to your mother about your worries and see if you can get any healthy ideas from her or a doctor.