My kids are all 4 to 7 years apart! So I had a helper by the time the next baby came along!
Just a little hint, if your dh sleeps harder than you, just give him a good nudge when you hear the baby wake up, and then Daddy can do at least half of the night time duty! If you are pregnant, you need your sleep to be able to stay healthy. Even if you only sleep for a few hours at a time, resting in bed or in a comfy chair while your hubby gets the baby will let you feel more rested.
I went back to work after my fourth baby, and at age 37 was very tired by work and baby care. DH sleeps like the dead, so I would nudge him to do baby care. And I was breastfeeding! So he would go get Shane, and bring him to me to nurse, then change him and put him back in bed! It sounds a little crazy...but it is the only way I survived the first few months back at work. He had to do part of the night time work! Maybe it wasn't half the time...but I wasn't pregnant, like you!
Also ask him to give you back rubs before bed...that will help you sleep a little longer, too.
My sister had a lot of pain with her second pregnancy...the baby was just too big for her to carry, although the delivery went just fine! And although Annie was a chubby fat little baby and toddler, she is a gorgeous slim adult now!