Advice pls?

Ok so I looked on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and I'm supposed to have my period over Christmas (Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>, Day an Boxing Day)!!! And plus we go on holiday straight after. Any advice on something I could do?