Baby Kitten question

Nicah • Scarlett Drew, March 18th 2017💕
I'm sorry, I made a post on here about my new kitten yesterday but now I'm worried about another issue 😕 I received the kitten yesterday at 4 pm and she hasn't ate, drank or used her litter box all day or night. It's been about 16 hours. Should I be worried or is there something I should do? The woman told me that she's been eating wet food so I went and bought her all different types. I also don't think that the woman had litter trained her but I've had my eye on her all day to see if she went on my carpet and the through the night she was in the bathroom which is hard floor so I checked for accidents and she hasn't gone at all. I'm not sure if this is normal as I adopted my other cat when she was older and litter trained.