Hi Everyone, I was hoping for a little advice

Caleb is a good sleeper and can settle himself usually, but over the past month when he wakes, he just sits in his crib and cries - almost like he doesn't know how to lay down again. When I wait for him to start really crying, I go in there and lay him down he gets really mad and starts kicking and crying louder. And this usually occurs between 4-5am. Should I just leave him sitting? I've tried the pu/pd and it just seems to make him cry louder (and then I regret it!) He has recently started pulling himself up and I don't want him to fall and hurt himself...but on the other hand...I need to sleep too!
His routine most often looks like this:
wakes 6:30-7am
E - breast (usually both sides) & breakfast
A -
S - 9am for 1.5-2hrs
E - breast (usually bother sides) lunch around 11:30
A-
S - 1pm for 1.5 hrs (would love to stretch it to 2...but I just haven't figured that out yet!) breast & snack when wakes
A -
E - dinner around 5:30pm
A -
E - breast before bed (7pm)
A - bath & bed by 7:30pm
Anything I can do? or just live with the 5am wake up?
I have done the W2S before - and it works well. However, last night I was going to wake myself at 4am to W2S for Caleb - but he beat me to it! he was up at 4am

Any thoughts would be appreciated.