Will she grow out of it or is it a serious problem?
She will only grow out of it if you train her out of it.
Doesn't Latte respect me?
Doubtful. She's young. Keep training and be stern, be consistent. She will learn.
Do I even have to make her scared of me?
No. You want her to respect you and love you. You want her to work for you because she wants to. You never want her to fear you. Ever.
Isn't positive training enough?
It can be.
What should I do when she acts like that?
Ok. So let's go over a few things.
1. Stop picking her up. When she's full grown you aren't going to want to be doing this. She will learn to expect it and continue to ignore your commands if the only time they are enforced is by picking her up.
2. Practice 'leave it'. Practice it over and over all the time. Make it fool proof. So when you need it to work, it works.
3. Leash her up. Correct her when she's chewing furniture. Crate her if you can't watch her.
4. Make sure she's getting enough exercise and training. Chewing is a sign of boredom.
5. She's probably teething. Give her something to chew on. Under supervision I have used a soaked towel that I rolled up and froze. You can use bully sticks, stuffed kongs, raw bones, etc. but supervise!
6. Reward her for good behavior! When she doesn't chew or growl or when she stops, tell her how wonderful she is!
7. Work on attention training. Every day, at least twice a day. Just use her kibble, grab a handful from breakfast, say her name. Get eye contact, say good or yes, and treat with kibble. Do the same at dinner time.
You are the boss. Don't let her have anything without you giving it to her. Work on NILIF training.
Good luck! Make sure you are socializing her as well.