Could it be implantation ??

So earlier I been cramping prob about 5pm but I went to the bathroom

And wiped and it super light pink so I showered and put a pad on I was so sure af was gonna start I’m 10dpo and tracked ovulation with opks but the only thing on the pad is literally 3 tiny dark spots now 11pm

Af is suppose to come in 4 days could it be implantation? Or is it too late into my cycle for that

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