Is this positive?

Hi there me and my girlfriend have been trying for a baby for 5 months now and every time she has always had a late period but negative tests. Today 4/08/2020 we took a test as she is now 6 going on 7 days late to her period and it came up positive (we think) and almost instantly, also it is still the same 10/15 minutes later. Can someone tell us if this is true cos we can’t believe it 😂😂