Sad. :( Confused :/

Stacie • Engaged. 💍 Stay at home mom 5 year old son due any day now with #2

Do pass three days spots once a day even today tomorrow is supposed to be first day of AF. Took a hpt test not to long ago. Negative. So here I am thinking it could be implantation bleeding. So I'ma test ago when I wake up. If bfn again and then I'll do a third time to test. I'll wait a few days if not then should I count this spotting as af being really light?