I got a faint bfp on 8dp3dt...I could barely see it, but it was there.
I am using FRER, dipped for 5 seconds, FMU.
It got a tiny bit darker over the next few days.
It was the darkest on 11dp3dt...but still faint at about 50% as dark as the control line
Today (12dp3dt) it seemed to be a bit lighter than yesterdays....it is about 1/4 as dark as the control line 
This is a chemical right? Shouldn't the test line be as dark as the control line by this point? I am 12dp3dt (15dpo)....all the other pics I see at this point are blazing positives.
Thanks for any help...this is my second and last IVF (I have POF and dh has MF), the first was BFN and I had a missed m/c 3 years ago (natural).
I am getting a beta done tomorrow...I guess I should prepare for the worst?
Has anyone else ever had a bfp that was faint but still viable?