I tested with CB ovulation tests yesterday and got a flashing smiley. Tested again today and got another flashing smiley but I took the test strip out and the line is slightly lighter than yesterday's. I'm CD12 but usually ovulate between CD18 and 21 so shouldn't have ovulated this early on and I never got a static smiley. Is it normal for the lines to get lighter? It's not drastic but it's definitely more faint. Tia