Prevention is key with anxious dogs and based on the info above, it sounds like she's keen on finding her own entertainment when she's bored/alone.
One of the best things we can do as owners is turn a dog's kennel into their "room" and ensure they have a lot of fun things to do in there. Since it's clear that Yuna likes to chew, consider bully sticks, knuckle bones, stuffed femurs, himalayan cheese chews, and other fun chew toys to keep her mentally stimulated. Stuffed kongs are also useful. I love Buster cubes for dogs who need the additional stimulation. You can either allow it to dispense treats as she plays with it or just put her whole meal in there and make her work for it. Hunger is a great motivator for dogs.
When it comes to anxious behavior, you must be one step ahead of your dog at all times and try to out think what she might come up with. If she's able to move her kennel on carpet, don't hesitate to block her kennel in with chairs on a slick surface such as that of the kitchen. A plastic kennel, as we discussed above, can be obtained online on websites like craigslist for cheap. You can also contact rescues to see if they'd be willing to switch a wire for a plastic one. Many rescues like my own have plastic kennels and prefer the wire ones (so people can see the dogs at adoption events). In some cases, they're willing to let you have it if you'll donate a small amount to the rescue. See what you can find, don't just jump to buying the $100 crates from petco if you can avoid it and money is tight. Also look on amazon, wag and chewy.com. They have sales and black friday is coming up. Another thought is Tractor Supply, if you have one in your area. Their prices are very reasonable, although the kennels tend to be a bit more flimsy. If she doesn't test the doors, they will work well.
Petco isn't a bad location for training, but they seldom deal with any behavioral concerns. And if Yuna was ready for advanced obedience at 2 years of age, chances are she may need more stimulation in her life to keep her from being destructive. A tired dog is a happy dog, so goes the saying. If Yuna has enough energy to figure these situations out where she is doing ornery things...now's the time to look into either another class that will challenge her or move on to strenuous exercise like fetch, playing with a frisbee, running, biking, flyball, weightpull, using a flirtpole, etc. Find what she likes to do and expand on it. You'd be surprised how much work a dog will put in for extra food and treats when they know they're pleasing you. A great deal of behavioral assessment facilities will tell owners that any variety of anxiety that involves destruction needs to be met with more mental stimulation and exercise. There are puzzle games that can keep dogs working and you can set the skill level on a lot of the games. Since expense is a concern, you can always make your own like putting food in empty soda bottles that she must move in order to get the food from within. Kong makes a toy similar to this called the Kong Wobbler (even my own cats will play with these because they distribute treats...so much so that we have to pick them up at night or someone will be up at 2am and knock it down the stairs and wake the whole household).
You mentioned a cry of panic but I see no additional info above. Can you tell me more about this?