Hello

I’m new on here and I was just wondering if there were any expert testers out there who can help me out

I’m 3 days late my periods are every 28 days I used the ovulation tests but didn’t see a rise my last period was 30th jan I don’t have any symptoms I just feel really angry I carnt explain it I keep on snapping at my partner I had sex every 3 days up until the 20th feb is there any chance I could be pregnant or would it have shown up but now I find this all so confusing thanks in advance xxxx