I think I softlocked myself in the room just after that painful fire room with the berry, there is no way back and the room seems impossible unless you enter from beneath.
It's possible you missed an exit at the upper left part of the room
The upper left is just... the entrance. Did I navigate through the game wrong and come in the opposite side?
EDIT: Oh my god forgive me. There was an exit in the upper left, I thought I tried going there but I didn't
