NEG. TEST LAST NIGHT LOOKS POSITIVE?

Last night i took a pregnancy test around 7 o' clock. It was negative at 9. Now it looks like theres a line??? Is it positive? Does this mean i'm pregnant? The line is super faint. Please. I had sex on the 4th of july. 8 weeks ago. 7 weeks after the estimated conception. If I were pregnant would it be blatantly positive