digital pregnancy test from walgreens?

[baby #2 due oct 25th 2010]

has anyone taken the digital pregnancy test that says pregnant or not pregnant? when u did and it said not pregnant but when u eject the pee stick part off and it shows where the lines are suppose be there was dark blue line but also very faint blue line next to it does that mean im pregnant just not enough hcg yet? has that happened to anyone and u ended up beign pregnant? and how long after tht test did u retest and get a accurate result of pregnant? thank u i also checked expiration date and it was in 2012 so i know that ok. and i cant ever detect ovlation on the ovulation sticks so i know that not it ot showing that from my last son i already checked after him and a test was neg so i know that one and i have been ahving basal body temp of 99.3 or 99.8 highest past two days