I have been following your story, and yes with baby number 5 all the tests kept telling me no and knowing my body i kept telling me yes. We spent about $50+ on hpt and the first couple were definatly no then the next lot were sooo faint, it was driving me crazy, hubby said untill he saw a big bold dark line that he was taking it as a no. 2 weeks after my period was due still had a faint line that you had to squint to see. My fingers are crossed for you. My baby is 5 months old and happy and healthy. We call him our little miracle, i was told that the pregnancy was not viable and i would loose him by 12 weeks, he was born at 38 weeks. We are trying for number 6 soon, and i know ill be going to do the whole test thing again, which just drives you nuts.
Love to hear how your results go.