Susan, my 14 dpo FRER had such a FAINT line (last baby) that the camera wouldn't pick it up.. but I had already had BFP's on Wonfo strips and morning sickness, so I went ahead and took the digi that came with the FRER and it said "+ YES".
Give it time. In a few days I'm sure it'll be obvious.
Haha. I figured everyone was sick of seeing my lines. Also I switched phones and I went a few days without the ability to take a picture. I will try to take a picture of my newest test soon (it has not been the time limit yet).
So excited! I was discouraged that this AM's test was not that dark. I just bought a few more tests, and the test I just took is much darker. This has been such an emotional time.