Late period but BFN HPT

So I'm over 7 days late on my period and have taken two BFN HPT. Not sure if period is just out of whack or I am pregnant. Don't want to get my hopes up :/ I have used two different brands and one that detects your pregnant 5 days before missed period as late as yesterday. Anyone ever have a test turn positive after a week late? Very frustrating! Either turn positive or at least give me AF