What does measuring 4 weeks ahead mean ?

Kerri ❣️ • Mom to 4 beautiful daughters currently pregnant with my 5th and it’s a boy !

I’m currently 28 weeks and 3 days and when they measured my stomach today at my appointment they said I’m measuring 32 weeks . I’m considered high risk and go every week until I have a scheduled c section on July 22nd due to health problems . I’m just not sure what measuring that far ahead means since with my other four I never measured more then a week ahead .