Hi, I was never on any contraceptive pills or anything, but I d like to go on trigestrel for 2 months then I will stop, because il b goin on vacation for a week and that week is when I suppose to get my period, so I figured the only way my Time of period would change is if I took the pill just so my period would fall on a different day, so how do I go about this? Would it be ok if I just left it? Would my period just go back to my 7day cycle again?