Breastfeeding

Seems like you have plenty of supply so no need to pump every 2 hours! Especially if you latch baby there's no need to pump at all, pump only as a replacement for baby's meal. Sleep is definitely more important, though you should be careful not to let it get too engorged or you might develop mastitis which is not fun. I think sleeping 4-5 hours in one go is fine, but if you sleep longer than that you will need to wake up, pump or latch then go back to sleep.

Will suggest you to pump or latch 2 to 3 hourly first. Until your milk have stable. Any dragging at this point will lead to Engorment or even Mastitis. Its from my experience. I understand its very tiring and torturing. You just need to endure awhile more. Slowly you can pump lesser time a day. I start to drop pump when my baby is 3 month old.