dilating more every week

I've been steadily dilating one centimeter every week 36-1cm, 37-2cm ,and now 38-3cm I got so excited knowing at 36 weeks that I was one. then at 37 when I was 2 everyone was telling me "it'll happen this week!!" or "she'll be here by the weekend!" and now when I found out today I'm 3 cm at 38 weeks I've finally stopped assuming it's gonna happen soon if ever lol. what's the most you've been dilated and for how long did it last?!