I've run out of HPTs and only have my OPK sticks left. I use the CB monitor. Today I had some brown spotting and discharge, and it's off and on-ish. I'm CD28 so thought AF rearing its head as I feel quite crampy. But i'm also feeling nausea which I never do when I'm about to get AF. So i decided to POAS using an OPK since it's the only thing I have. So two lines have come out, but no smiley face. What does this mean can anyone help??