I'm on Tri Sprin Tec and I'm not scheduled to get my period for another week and a half but I've been feeling PMS-y for all of this week. Cramps, bloating, etc. Does this mean that my period is coming a week early or something? If that's the case, then I may as well get an IUD if I'm never going to know when my period is coming... (is that the case with an IUD or do you know what week you're going to get your period?) Thanks!