Confused..implantation bleeding or Af coming

Angelica
So yesterday i was cramping went and used the bathroom when i wiped i noticed a pinkish discharge i figured it was af flow starting and put on a pad then around afternoon i went to the restroom and nothing at all.. the pink spot discharge did happen one more time before i went to bed...i expected my period to be here this am but nope nothing ...any thoughts on what this could be?!