I have a 27-28 day cycle but back in October I got my period after 23 days. This month, I got my period again after 23 days. I looked up online and there are some opinions claiming that if an egg is fertilized but fails to implant, it can cause an early period. Is there any truth to this statement? Also, my temps were pretty high. In fact last night, I was feverish and DH also said I was very warm. But today in the morning I woke up to AF! Was totally not expecting it since it came so early!