Question: Implantation!?

Af Was Expected To Start Today But Didn’t. Put A Tampon In First Thing Lastnight Before Bed Because Af Usually Starts Early Morning, Woke Up This Morning Took The Tampon Out To Check & There Was A Little Bit Of Brown Blood On The End Of The Tampon, Nothing Major Like The Start Of My Period. Been Wiping All Afternoon While Going To The Ladies Room & Nothing. This Couldn’t Be Implantation Can It?!