Ovulation tests - invalid?

So I'm due to ovulate today, I have been testing since about 25th and below pic is the nearest I've got to a positive. Every test I've taken has been the same batch barring the one below on the 26th, all the other tests have a really faint control line and none existant control line even today on my predicted ovulation day.

Soo my question is, do you reckon the ones with a really faint control are all someone a bad/invalid batch? They are Internet cheapies OR am I just not ovulating at all this month 🤔

Sorry for long post