line eyes or faint line???

So I tested with a blue dye and got what I think is an evap. 
That was yesterday morning. So last night I got an FRER and it was totally negative. This morning I used a test from the same box and think I see a faint line but idk what to make of it.  I know tests can have shadows that come up in the time limit. This one did come up within 3 minutes I just don't know if it's me being nuts or if there's something possibly there