If that test strip was originally in plastic casing (which I'm assuming it was), how long was it before you took it out? I read up on this a while back and (I think it was on peeonastick.com) it said that you shouldn't open them up because it can give you a false positive. I know the month I got pregnant, I had a pink line come up, took it apart cos I wanted to get a clearer look and then the line vanished. Like everyone else, it's hard to tell whether it is pink or grey but I'm sure I can see a touch of pink to it. Good luck xx