Hi everyone: so dh and I are back at it again after some break. we had bd about 9 days ago, after my fertile window but while I was still having watery cm. Af was due on 3rd and got pushed to Friday. I'm thinking this is Af but today I had some major lower back pain and cramping that didn't feel familiar. Anyway, got home and noticed this in the tissue thinking it was kind of pink. Af usually doesn't start off this bright, could this be inplantation?