8DPO symptoms?

Caitlyn • I`m a momma of a beautiful 3 year old trying to conceive my 2nd
I'm currently 8DPO, I actually took an HCG test this morning, negative of course because it's too early to tell anyways...Glow says AF isn't supposed to start until 12/28 but today I'm having cramping, indegestion and even light CM. CM looks white but it's not super creamy or sticky. I never get cramps unless I'm on AF. Anyone else experiencing this?