Evap line with FRER??

I've been extremely sick with a stomach bug, but to ease my mind I took a pregnancy test just to rule it out. Nothing showed up immediately (like with my past pregnancies) so I forgot about it and went to bed. I looked at it about 30 minutes to an hour later and saw faint line. Then again this morning. The first picture is 30-1hour after, and the second is the morning. Has anyone ever gotten Evap lines from a FRER?