Implantation or period ?

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My period was suppose to start Monday/Tuesday but i didn’t start spotting yesterday (25th) I had spotting once yesterday and today when I wiped the same spotting! Is this too dark for it to be implantation though or should I test? 🫣

Cause if it was my period i would’ve started my flow today right ?

I’m not really cramping , my boobs have been sore, and I’m somewhat nauseous.