... or is it one of those blue dye false
What brand of test is it?
If you look here http://www.peeonastick.com/hptshowdown.html Most of the blue dye tests have a FULL line of color, not just a small part of it.
I would take another test that's different, not a blue dye or a +/-
That is a One Step from Walgreens.
I just wen to the store and got a 2 pack of First Response... I just took one and it is very negative.