Any way to postpone a period

So my period is due in about 12 days. I have another tracker app that I've been using for about 1 1/2 years and it's pretty good at predicting but it's often off by a little. It said my period was due New Year's eve throughout my birthday ??? are you kidding me? So I got Glow for a second opinion... Same thing. I don't want to have a period & be cramping on New Years nor do I want it on my bday. Soo, any way to postpone this little sucker for a few more days? ?