Late Period Negative Test, updated.

Im currently 7 days late today and have a slightly irregular period that goes between 27,29,31 cycle length. Im currently on Cycle length 36 days w/ no flo and a negative test. Has anybody else experienced something like this? What was your outcome from it?

Update: its been 11 days past and still no flo, waiting till day 14 to make an appointment. The girls have been pertruding shades of brown starting from the outer aerola inwards, but am gonna try to not get my hopes up.

Update Day 12: Hips and lower back very sore when I've woken up the past 2 days but nulls down until I bend over.