Any ideas why I’m late?

My period was expected on the 2nd of this month. The day before, I had a pink tint discharge. It only lasted about an hour but I had put my menstral cup in assuming my period was coming. Fast forward to today, the 4th and still no sign of a period. My cervix is high and soft. My diet hasn’t changed at all. I don’t feel that stressed about anything so I took a pregnancy test and it’s negative. I also got my period five days early last month so this period seems extra late. Any ideas?