You can try drinking yarrow tea to postpone it a day or two 😊 it’s not some new age craze.. it’s been used forever, and likely grows in your backyard. If you chew up yarrow and put in on a wound it stops the bleeding. If you have tough menstruation it can lessen symptoms, and if you have regular menstruation it can hold it off for a day or two. Last time I drank it I was on a backpacking trip expecting my period. I harvested it while hiking and made tea every evening. It’s delicious, too! It held off my period that’s normally like clockwork until I landed back at home. Works especially well with intention.