⚠️❗️Still No AF❗️⚠️

Keyanna • Married. -02.14.13❤️. Mother. -09.05.13.
I was suppose to get af on Oct 20th. I have been having some mild cramping on and off for this whole week and even a little tiny bit of blood in my CM. My pregnancy test having been coming back negative. I keep hitting my period is late on the calendar so my next time to start is tomorrow. If I don't get my af what should I do?