Both my boys love having their 'babies' in bed. They have since probably around 12mths too. They have their favourites.
Has she reached a milestone that could be causing her to be unsettled? The other thing maybe she is sensing your pregnancy and impending baby and just wants extra re-assuring cuddles.
I have a dinosaur Giimmo night light for my boys. They can cuddle it as it doesn't heat up at all and it lights up enough to keep the monsters away. It's brighter than I thought, but they love it!
I bought mine from the bambini pronto online we.
The odd night in bed with you shouldn't be a long term habit, if it's every night, it could become difficult to break, especially when your baby arrives.
Hope she settles soon for you, it's tough when you are pregnant especially