dilation?

Kim.
So, just 3 days ago I went to the doctor because I've been having really bad back pain and contractions, not ones that are very close together so anyway, the doctor checked me to see if I had dilated anymore because I got checked at my 35 week check up and I was 1cm dilated, he checked me and I was still dilated to a 1. well I go back today for my 36 week check up and I'm 2cm dilated, but just 3 days ago my dilation hadn't changed, does me dilating pretty fast mean that baby could be coming soon? I'm a FTM.