Oh Morri that's awesome!
Cridge-oh very sudden! haha I wish it gradually increased but no. My lo up until a couple days ago slept allllllll day and all night other than waking up day/night every 3 hrs to be fed. (sounds like a lot of sleep for us too but you know how it is once theyre up, fed, burped, bum changed, settled, not a lot of time until youre up doing it all again) and he was waking up at 2am for an hour or two, that sucked!
(my doctor said the sleeping all the time was a typical premie thing for first month at least and then typical newborn thing once caught up to gestational age due date. He's now caught up to his due date so perhaps that's why things are evening out I don't know)
As of about 2 days ago he started being awake more during the day! For couple hour stretches at a time.
this sleeping longer at night just started 2nights ago. I'm hoping it keeps up! My oh works graveyard shifts so I'm on my own all night and more sleep is so much nicer especially when I have to be up at 6 to get my foster daughter up and off to school.