Hi I Am Trying To See How I Can Change

Hi I am trying to see how I can change my period date as I dont want to get it while on vacation since I have heavy cramps and am miserable. I used to take Yaz for about 7-8 months with not much side effects but stopped a year ago as I felt I was gaining weight. I havent been on any birth control pills since then. I just started taking it again two nights ago after getting my period so that I could skip my next period, however I have been feeling nauseous and have been experiencing hot flashes after taking the second pill. I am not sure if it will get better or I should stop taking it? and if I do what other options do I have to change my period? would Duphaston be another option? and if so how should I take that?