I don't know if I'm paranoid and freaking out but my body has been feeling unusual for the last couple weeks. I have taken 4 pregnancy test. The first 2 were negative after taking them 5 days before my missed period. On the day of my missed period I could have sworn I saw a faint positive but then thought it could have been an evaporation line. This morning I took one and I think I still see a faint positive. If I were pregnant should it be a dark line after my missed period?