First time mum

Sharon

Hey so I found out Tuesday the 25th that I was 2-3 by the clear blue test I log in to the pregnancy + app and it’s telling me in 5weeks 4days today then I got on to the nhs pregnancy Calculator and it’s telling me I’m 6 week what one should I go by as I need to contact my midwife/docs when I’m 6weeks to get my appointment sorted out please help x