AF 2 days late now and I've had BPNs over the last few days on ICs. I used up 2 FRERs last week and don't want to waste anymore money. I ovulated around the 19th/20th September. Today I've been having a lot of cramping in my lower abdomen and I was sure AF was going to arrive but no sign yet. I also had a small amount of light pink CM when wiping. Surely it would be far too late for implantation?