My puppy barks at me when I get up and walk off

I got my 10 week old lab/English pointer puppy two days ago. We immediately started her on crate training and she’s doing great. When we are sitting on the couch, she will bark and or growl when I get up to walk away to the bathroom etc. is this separation anxiety? And how can I fix it? To add, we also have a 1year old Boston terrier that never did this and I’m new to owning a big dog. She does try to play with the puppy but I’m worried it’s stressing the puppy out causing the anxiety. However, the puppy keeps going back to my Boston initiating more play time so I honestly don’t know. This is my first time owning two dogs at the same time and I don’t want mess either of them up so any advice is greatly appreciated! Thank you.