I normally chart my periods with the Fertility Friend app on my phone (not TTC, I have a Paragard IUD). It has been pretty accurate up until this point. I started having more severe than normal cramps the day before yesterday, 4 days before my period "should" have started. I started having heavy bleeding yesterday, even for a normal period I usually spot first. Today I am still having heavier than normal bleeding, bleeding through a tampon in less than 2 hours, (normal is changing my tampon every 4 hours and its not quite full) and cramping, take my breath away cramping. I've had my IUD for a year now, so its not anything new from that. I've also been more tired, edgy and downright cranky the passed week or so... I don't think I'm pregnant, or at least I hope I'm not... So what else could it be?