Dilated

Fiorella • Parents of a precious, loving boy and a beautiful princess
4/13 I went into Dr for weekly appointment and there was nothing new. Went in this Wednesday 4/20 and this time he told me I'm 3cm.
My question is, going from 0-3 in one week, can that mean anytime? Or can that mean just that fast of progress in one week but could not dilated from there until probably the end. I'm 37+3 with my second. My first I was 1cm for an entire month before having contractions at 4cm 2 days before his due date.