With my first one, she dropped, and I was already carrying low - i moved from the sort of funny walk to the straight out waddle. I could definitely tell she had dropped, and so could everyone around me - i kept getting the "when is that baby coming" comments ALL the time after she dropped. I must have looked like a house.
and I remember the B-H the first time, I didn't even know what they were for a long time - didn't hurt, just felt like my whole tummy got tense on the outside and then it would go away.
I am 30 weeks with #2, carrying so high that none of my old maternity pants fit...who knows what will hapeen with this one!