I have an old (2007) EPT Certainty Pregnancy test, not digital.  I tried it today and I don't know how to interpret the results and i already threw away the instructions.  There is a long retangular window and a circle with a line through it.  When I tested only one line showed up and the circle is kind of light blue....do you know what that means?  Are there suppossed to be two lines if positive??  thank you.