Cramping 3 DPO. Early sign of implantation? Or AF?

Nichole • 26 | Newlywed💍❤ mom to my sweet girl, Owynn 10/2017💕👶🏻 TTC baby#2, VFL on 2/2. EST Due date 11/16/19
DPO. Early sign of implantation? Or AF?" />
I don't typically cramp until 1-2 days before my period and sometimes not even until after my periods actually starts. My period isn't due for another week.
I had about 5 minutes worth of cramping yesterday (2 DPO) and consistently for about the last half hour, pretty severe compared to my usual ones. 
Could this be implantation? Or just AF?

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