Implantation bleeding?

Renee

The last 2-3 days I’ve had mild cramping followed by some brown discharge and light pink spotting. I’m due today for AF with no sign of my period. Just some mild cramps (i usually have terrible cramps and heavy flow from the start). I took a test this morning and it was negative. Could that spotting have been implantation bleeding? I never had that with my first. Thanks!!