How to delay periods


I am going on a trip with my boyfriend on 28th of Oct and according to <a href="">eve</a> my periods are gonna lie on the same days as those days. I don't want my periods to ruin my trip. Please suggest some medicine to delay my periods for 10 days. I have read about regestrone 5mg, which can maybe help, is it safe, I am just confused. Any suggestions?

Edit: I live in india