Clear Blue digital reliability?

[Newmum26]

I have taken two digital CB week indicator tests as I am a few days late for AF now. Both said 'not pregnant'
I've ordered some First response line ones as I've heard that the CB aren't that sensitive early on?
Anyone has any experiences?

When I last used this test I was 4 days late and it said negative when I re took it a few days later it was positive. I definitely don’t think they are as sensitive as other ones even though they say they can detect a positive result before the periods even due

My clear blue digital didn’t work until about 5 days late for my period . I used a first response and a clear blue line one, both said positive when I was a day late and then the digital was 5 days after that . Good luck x