baby dropping, 2nd pregnancy

okay so this is my 2nd pregnancy.
my son was born at 36 weeks. almost 2 weeks after he dropped.

now today im 36 weeks, 37 on friday.
my little girl has dropped since monday so a little over a week ago.
I asked my doctor about it on friday, and he said yeah she has dropped. shes really low down there in the pelvic i can feel her head. thats what he said lol.
im thinking that this girl is going to be coming real soon like this week, maybe next week.
with 2nd pregnancies do babies drop right before labor starts, within 2 weeks about?