So this morning I have one positive test and one negative test.  The digital test is supposed to be very sensitive and tell you your 4 fertile days (w/ 2 peak days) and shows a smiley face when it's positive and a circle when it's negative.  The bottom test stick has a pretty dark line today( has been no line or light line before today) so I would have expected the digital test to have a smiley face since the other test shows I'm near peak fertility.  What do you think?