8 days late. What’s going on?

Hello ladies,

According to grow calendar I was supposed to start my period on the 11th. I am now 8 days late, took some cheap tests and negative.

I had light pink spotting (cotton candy pink and the size of a quarter) when I wipe after using the bathroom for 2 days then today it stopped.

My periods are very regular and I haven’t been on any stress etc. I have never ever missed a period or more than 2 days late in my entire life. I have used glow app for years and the dates are always correct when I am supposed to start.

Considering going to the doctors. But maybe I could of ovulated late? Had this ever happens to anyone?

Thank you! 😊