when to pack bags?

Jenna
I had my twin boys at 29 weeks because of preeclampsia and HELLP syndrome. I am pregnant with a singleton this time currently 27 weeks and due in December. I had just started gathering a few things to back when I had my boys and had no bag of things when I was admitted. I am wondering if I should start now packing the bag for this time? I am anxious because I have to clue when baby will come.