This is ordinary. When you were pregnant, you would be rocking her to sleep with your body motions most of the day, with her alert periods being mostly in the night when you stopped moving. It typically takes 3 - 7 weeks for kids to 'get it' that nighttime is for sleeping (more) and daytime is for waking (more).
She will be genuinely hungry through the night until she's around 2, and will continue to wake regularly until she's around 4... but through household management, you can gently ease her around to a daytime schedule.
Keep the house quiet and dark when she wakes at night. Stay with her while she falls asleep, or bring her into your bed. Contrary to popular fears, teenagers have absolutely no interest in sharing bed space with parents... she WILL move out of your bed once she stops needing you so much in the night.
For now, her tiny, instinctive brain has no idea that being left alone is safe -- she only has instinct to guide her, and being put down in a forest is certainly dangerous for a baby. How would she know about walls and the absence of suburban tigers?
She only needs a few things right now: love, food and security. All three are available in your arms. And she knows it, it's why she feels so good there.