I can definitely tell you there aren't any secret or inaccessible rooms counting against you. If you aren't missing any rooms, chances are you're missing a type of item that looks intact-ish, like the stools (overturned or not, you can pick all of those up) or - if you've actually managed to do basically everything - just the table in front of Melissa (which could be getting overlooked because she's using it) or the handful of bits in the gallery since it's easy to mentally cross it off as being part of the same map where you've done everything else.
Though if you're that close, you should've already gotten some kind of notification to talk to Phoebe from Ella. Even if you're not getting the "you're completely done" notification every time you walk into the main room of the first floor, there is a leeway gap to try and prevent situations like yours so you can go into the Deep Wilds to finish gathering the wood you need rather than going insane trying to find the last straw of hay that's left of the haystack you already cleared out. The trophy only cares about whether you skipped repairs or not, so you won't miss it by going to the Deep Wilds early if the option is available.








