Line progression and spotting

Shannon • TTC #1

I am 14dpo. Since 8dpo I have been having light pink/brown spotting. I have had vfl since 11dpo. It looks as though my First Response is getting lighter and by Premom might be a little darker. I am still spotting and AF is due today. I’m worried I am having a chemical. Anyone have spotting and vfl for this long and they eventually got darker?