Is it Positive?

From the 3rd down the line is dark but then again the strip have turned yellow so it might also be evaporation line (exposed too long). Try using other brand of kits. If it shows the same, congratulations you are pregnant! I highly recommend the Clearblue Digital cos it will state how long you have conceived. Or better go to polyclinic straight to confirm cos you'll still need to confirm your pregnancy with a dr.