so, think implantation happened exactly a week after Ov, in the early hours of sunday morning. took a test Tuesday, faint positive, yesterday the same and today the same faint positive, lines don't appear to have gotten any darker. af due Saturday, only real symptom is heavy feeling boobs. has anyone else had faint bfp 3 days after implantation? concerned it could be chemical/ectopic if line doesn't get any bolder tomorrow/sat.......