Is it possible to get a positive 8 hours later?

[rustyswife828]

Ok girls.. I took a FRER yesterday and it showed a very faint pink line in between the time frame.
I came home for lunch and saw the line had gotten darker (8 hours later)

Has anyone had this happened and was indeed pregnant?
I'm doing another test in a couple of days.

I've had several "signs" that made me "need to test"

First picture is FMU
Second picture is 8 hours later

 

[rustyswife828]

?