At a bit of a loss

LO is 9.5 months and happy as anything, but he’s started to get really fussy with his food/bottles, has gone from sleeping 7-7 to waking once or twice a night before getting up at 5.45/6ish and not settling back down. We’re on about week 3 of this and I’m really struggling with what to do. I’ve adjusted naps, I’ve tried to ensure he’s getting enough to eat, he’s not cold in the night… I just don’t know what to do. He’s not really teething (already has 7) so any advice is much appreciated