Can't someone help?

Danielle • Artist & crafter. Vegan and devoted to being child-free for life.
I've been tying to figure out if the last day of my period when I have just brown CM, no red blood, actually counts as the last day of my period. 
​It's light but it's more than a drop. 
​I know it's the old blood but I really need to know if it counts as a menstruation day, please!!