I took this test and then I thought it was negative so I put it in my bag. When I took it out the next day it had a thin but bright blue line on it. I've seen a lot about evaps but also there is a thicker blur of blue on the window also. I've read that evaps cannot activate the dye and this is so blue. I took this test way too early as I would have only conceived a week ago. What do you think?