Confusing (TMI)

Megan
Glow is confusing. The whole furtile window must be off. 
The other day when my husband & I had sex it read that I was only 2% chance of pregnancy
But following my past periods I was on the highest day. 
6 days ago. 
Then yesterday I was cramping (according to glow I have 8 days till my period)
Then this happened:
Yesterday's was light pink. 
This morning more brown then red:
I just don't know what to think. I have other children so you think by now I would know the early signs but my last child is two. 
Someone give me some insight please. What would you do?
What would you think?

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