I need help!

Annemarie • I'm 31 years young.. i live in west bromwich uk.. i have crohn's disease 😟 so hope this works 😊
So i took a couple of pregnancy tests first one didnt show anything but then i took another later on on the evening and it may have showed a vvfl but when i looked at the test again later on that line disapeard... the line had shown up within 6 mins of taking the test.. is it possiable it was just an evap?