I did an FRER on Tuesday and got quite a dark line. The only tests I have now are the dip ones which I bought from access diagnostics which I've heard are supposed to be quite good (they are 10miu). The lines are deffo there but they're not seeming to get much darker and it's worrying me slightly. I know a pregnancy test can't tell you how your pregnancy is progressing or anything like that but I'm almost certain that they should get darker the further gone that you are - at least that's what happened for me last time. I should be 4 weeks 1 day pregnant today. I haven't got any CB digis but I've just ordered some from ebay because I don't want to do any yet. Just wondered how long it took for your lines to get darker?