Hi, I had the same with an earlier pregnancy but then on the next one got BFP at the expected time. I never found out why it took so long to get BFP the first time as I'm pretty sure that I did the test correctly and didn't use a cheap test. Good luck!
Thanks Prinpo, I never found out why it took so long but didnt really worry about it at the time but since ttc no.2 I have always left it ages to test because I assumed it would be the same? Was hoping it was this month but AF started today so starting Clomid tomorrow, just hoping I get a BFP finally and it comes earlier this time