Oh my gosh Lee, I can completely understand where you're coming from when you queried why can't we wait a week after AF due before testing? !?!? I tested early this morning with FMU too, around 4.45 am, and exactly the same thing happened with me (just posted this on TWW thread)...I went back to bed without reading the result within the recommended 5 minute time, but when I went back to throw it out a couple of hours later, I noticed a very faint pink second line. And same experience as you, I've never had an evap line show up on these ever before (the ultrasensitive midstream tests from LC). AF not due for me until Thursday, so it's still early on for me, and DH & I are still wanting to be 'cautious'. But I really do hope that our second lines for the both of us are the real deal. I won't be testing again until tomorrow morning with FMU. I wish you all the best with a bigger & darker BFP for you!