Implantation bleeding? No pic

2 days ago I had a small amount of pink spotting when I wiped after peeing and nothing else since no cramps no other signs of my period. We are TTC so having unprotected sex and tracking my cycle. Not sure when my period should be due but probably any day now. Was this my period trying to start or could be implantation bleeding? If my period doesn't start when can I test?

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