There is a glitch now where if u try quick birth in battle againts normal enemies, the game will just freeze and you'll have to reload the entire thing. This glitch made me do the entire mansion, nursery and volcano again
Sounds like you might want to save more often, and with so many save slots (I think there are like 50?), there really isn't much reason not to save more often. Honestly, I would recommend saving regularly on a different slot after each area or major event until the game has been completed. Saving to only one file might leave you in situation where you accidentally softlock yourself and have to play the entire game all over again.