Implantation bleeding or starting period ?

Hey guys so I was just wondering was this implantation bleeding or not supposed to start AF tomorrow had sex during my fertile window and have been cramping since 5dpo also the bleeding was minimal as seen in the pic and it’s stopped already (even stuck a finger up there to check and it was just clear discharge) it’s kinda weird my periods usually start super heavy and doesn’t stop until about the 5th day any advice ? Also had sex yesterday and right before I had so much EWCM it was dripping out in long strings like slime anything helps just need some advice !