I know for a lot of women their cycles aren't regualted. i know mine sure aren't. so just wondering for the ladies who have irregular periods. how do you know when you are about to start your period? does your body give off signals? mine does. i know im expecting a monthly when i get really gassy. like it doesnt matter whether ive eaten or not i burp and i pass gas constantly. it usually starts two or three days before i start flowing. thats how i know im expecting and it give me time to prepare...so if im out of pads or tampons i can go get some. and i start to sleep with pads on so i dont ruin any undies.