af 3 days late cramping since CD25

3 days late, no sign of period except cramping for the past week lasts a few hours then goes away. Today is the third day with no period sign just white discharge, and yesterday had severe stomache ache couldn't stand straight, no nasea or sore breasts tho also last few days been feeling hot on my body and face but getting  the chills, anyone else having these symptoms with late period? I appreciate it if anyone comments, Give me some advice