I know Clearblue isn't the best, and I should've checked within the time window, but after I took it, I left it to take care of my son. I came back after a while, and saw a deep blue, thin line. Definitely not faint, gray, or colorless like normal evaps. I have an appointment with my OB Monday and I'll ask for a blood test then, but I'm going crazy in the interim! What do you think?