I am late and yesterday I bought one of those test that you pee in a cup then use a dropper and put drops in this little circle. I looked at it after about 2 min it only had 1 line. I threw it away then something told me that I did not wait long enough so i went to the trash i would say 8 min and it had a dark not faint positive line?Could the line being that dark be false? If it was an evaporation line would it be light?