maybe she isn't ready?

mamaX2
We've had our 5 month old sleeping in her own room for about a month now. During that month she CONSTANTLY woke up at night like 3-4 times and sometimes would refuse to go back to sleep. Well last night she slept in our room in her pack and play and she woke up once to eat and get a diaper change around 12:30 and then went right back to sleep and slept the rest if the night. Could it be possible she just isn't ready to sleep in her own room?