If it's related to brain development it's unlikely. If she's always been a hysterical screamer and didn't want to sleep on her own and you made her anyway then that would have rewired her brain earlier on. If on the other hand she adapted wonderfully to sleeping in her own bed everything would be a lot worse now because you'd be used to her sleeping in her own bed and suddenly she won't leave you alone even at bedtime along with being a wailing banshee XD

There's a lot going on in that tiny little baby brain of hers and she can't understand it either :)

It might be worth examining how you and hubby react when she bumps into things or falls over as some of the preciousness could stem from learned overreactions to relatively minor issues. Otherwise I'm pretty sure you just have an oversensitive little soul on your hands and part of the fun of the next few years will be trying to make sure that the beautiful delicate flower has the mental fortitude to deal with the world :)

Once you've ruled out/dealt with all the normal stuff you might also want to have a look at what kind of energy flows are going through your house and possibly fix/reroute there as that can easily set off oversensitive little souls :D

And try to remember that while she'll be your baby forever the actual baby stage is ridiculously short in the grand scheme and these situations feel like they last forever when you're in them, but when you look back you'll realise they were like a blink or a bad dream :)