Hi, firstly congratulations on your new bundle of joy!
I know how tiring it must be bcos I was there too few months back. I would usually pump 3-4hrs, even at night. I can’t go beyond 4hrs as I’m prone to engorgement & clogged ducts. I’m exclusively pumping btw.
What I used to do is, whenever baby wakes up for feeding at night, you pump as well. It will be hard as you will need to multitask but as time goes by you will be a pro! ☺️ My husband actually taught me this as he saw how tired I was & it actually helps as you will get to sleep few more hrs.