Hi
I have just discovered that I am PG, I did a clear blue which was no doubt BFP on the day my AF was due. Then I did a predictor, which was BFN, so I went out and bought a first response which was a clear BFP, then I found another clear blue in my drawer which I had forgotten about so thought what the heck, and did that too and got another strong BFP. The next day when I checked the predictor again, it was a faint positive!! So it just goes to show, the tests are not 100% reliable, and different people respond to different brands better than others. I have heard a lot of negativity about the first response, but it showed a clear BFP immediately for me, whereas I wouldnt recommend the predictor.
Sorry to rant on, but my advise is to try different brands, clear blue seems the best from what I have heard.
Kim xx