where are you period?

so I normally have a 27 day cycle. and my period was supposed to Start last Thursday on the 12th. but it still hasn't showed up. I'm currently on cycle day 31. and I have some strange cramping going on, constipated, flu symptoms, tender breast, headaches, a little bit of heart burn, leg cramps, back aches, fatigue, raise in appetite, urinating frequently, moody, etc.. idk anyone want to help me out with some kind of info.. lol last period was September 20-24.