Faint bfp then negative.. Has this happened to anyone?

Chrissy & Bridget

DW (dear wife) has received a few faint bfp's. The most obvious is the one from last night and now today it looks negative. DW started spotting light brown, possible implantation spotting, a week before af. Today it's starting to look reddish.

Has this happened to anyone and had a successful pregnancy?