pregnancy

Ba
So I went to my doctors appointment and they performed several exams it turns out that I have been excreting my mucus plug along with my regular discharge she said that I still had a little bit left over and that my baby's is already facing down birthing position!! She checked for dilation but nothing yet I have an appointment in two more weeks where she will be checking for dilation once again I'm getting kind of nervous!! She said that if I happen to start dilating that I either have two options, go home relax and wait it out some more, or go to the hospital and wait for more dilation and contractions to occur the whole 9 yards unless she says that it's time to go to the hospital. 
Im so nervous,  I'm currently 30 weeks and 4 days!!! My question is.... how long did it took for y'all to start dilation after baby was facing birthing position??? I'm sure it's different for everyone, but I'm just curious!