Ok so I am supposed to start my period today. I know it still early and it could still start but normally it always starts by noon. I usually have cramping on and off before it starts and feel like crap but I have had no cramping and feel fine. I have been more tired lately but thats all. My cycles are like clock work they always start on the first Friday of the month and last about 3 days. Last month everything was good but it was shorter and lighter than normal. I am on birth control but I did miss 2 pills this past month. Could that change my period dates??? Im freaking a little i had my first son while using birth control.