Need help - implantation bleeding?

Tiffany
My last period was 11/4-8... Glow tells me my fertile window is 11/15-21 however I Ovulate very early.. Usually right after my pd ends. 
So this month my fertile window was 11/11-11/17 or so. I only recorded 11/13 and 11/16 as intercourse days but I know there were more lol.
Currently I have some spotting. Not due for My period until 12/2 or so.
Could this be implantation bleeding??

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