Still waiting for a period, Can bloods ever be wrong?

So, I’ve not told anyone else but glow. When you need to speak out but don’t want too lol. Ive obviously been ttc. Normally my periods are 24-25 day cycles and very regular. I’ve had bloods taken to see if I’m ovulating. Apparently the bloods said I ovulated but nothing (I don’t understand the technical terms lol) so I’m day 27 and still no period.

Can bloods ever be wrong?

My friend went for bloods taken when ttc, they said she hadn’t released a egg that month but she was actually pregnant at the times of her bloods taken!

I’ve had cramps today so I’m assuming I probably will come on tomorrow but it’s always in your mind isn’t it!....I deleted this app because I thought stuff it I’m not thinking about it anymore...well. Here I am 🙄 lol