struggling to work out how far i am and my due date🤔

lexi

ladies im really struggling to work out how far i am now and when my due date is as theyve moved my 12 week scan to the 2nd of august, it wasnt supposed to be until the 9th of august, but from my last scan theyve now changed it to a week infront, does that now mean im a week further on than we thought? and will my due date be put a week infront aswel? im so confused this is my first baby, any help will be very much appriciated xx