Can I Safely Manipulate The Timing Of My Period To Avoid It During A Pilgrimage?

Hi doctor, I was expecting my periods around march 25 to 29 and sill have not got my periods. I had planned temple tour on Apr 12 , 13, 14 dates. I'm worried if I get my periods during that time. I either want my periods to happen right away or after 15th . Please advice.