Implantation bleeding

Willow
I feel stupid for not even knowing this, but since I'm TTC #1, I'm kind of a noob!
Does implantation bleeding happen to everyone? I'm two days late right now and trying to hang out until a week late before testing, if Irma hasn't shown up by then, and since I haven't had bleeding of any kind since my last cycle I'm wondering if that's a sign that I'm not pregnant.