I'm due on my period today and is getting heavy pelvic pains lower back and groin pains. still no sign of my cycle. i have a cream smelling white disc?

Patience is key: It sounds like your body is gearing up for your menses. If you do not have your menses in a week take a pregnancy test. If negative repeat in another week. A couple of days late depending on what's going on physically or mentally is not unusual. For the pain consider exercise, warm baths, ibuprofen. If you continue to miss your menses for more than 2 cycles with negative preg test call your doc