My last period was 21st July and I had unprotected sex on the 29th July (my ovulation day) he didn't finish inside me but I'm now 10 days late. (Day 34 of cycle)

I'm usually regular as clockwork but not this month!

I took a cheapie digital test on Saturday, which was negative, but now I'm having doubts about the accuracy as there's still no sign of my period and I've been having a few pregnancy symptoms I.e. Mild cramps, insomnia, nausea, loss of appetite

Has anyone else experienced a fake negative from a digital test???😅

EDIT: just took another test and it came back negative again, what the hell is going on😩