Maybe it's my sleep deprivation, but the advice around the 4 month sleep regression seems to conflict with itself?
On the one hand - do what you have to do to survive it. Continue to rock/feed/whatever to sleep as you had been.
Then - the way to get to the other side is for baby to learn how to self settle (and therefore not need you to rock/etc every hour)
But how do those work together? Do some babies just learn on their own and go back to their "old" sleep patterns? What if they don't - how do you get them out of the hourly waking (especially if sleep training isn't recommended till at least 6 months)?
Sorry that became a bit of a rambling stream of conscious, but I'm just. SO. TIRED.