Starting to Drop

Hi ladies!
At what week did your twins start to drop in your tummy? I am 31 weeks and our little boy had been riding low for a couple weeks but now it seems like both of them (b/g fraternal twins) have dropped! This is my first pregnancy and boy oh boy it is getting harder everyday! The other day I started to tear up after our little boy pushed his head into my bladder! It was soooooo uncomfortable and a bit painful! Just when you think it doesn't get more uncomfortable it does! Thanks for all the support ladies I would love to hear what you all have to say