HELP w/ separation anxiety PLEASE

Hello, I am new to this forum so bear with me...
I adopted a 9 month old terrier mix in April after putting my 17 yr old yorkie down. It might have been a little too soon but we got another one anyway. Bella is an awesome dog, she was already potty trained in fact she never asks to go out she just waits till you take her. She knew to sit & lay and we have taught her to shake so she certainly isn't dumb....she was found on the side of the road in Oct with a broken right leg so no one knows what happened there. The rescue place had her in 2 seperate foster homes and one family had tried to adopt her but they had big dogs that picked on her so she was returned. And has bad as I am we have called them 3 times to take her back...but we still have her. She is very loving but also super needy as in she is up my butt all the time...so hence my first problem. When I leave for work I have to go out the front door and walk around to the garage because she destroyed the carpet leading to the garage. Everything is always fine when I come home for lunch to take her out, but of course I can't stay long and that is when the destruction happens. Every night she has destroyed the throw rugs I have down so today I took them all up but the ones by the front door...well she didn't destroy them but the carpet around the entry, and I mean destroyed it. I always give her a chew bone when I leave but I guess they don't last long obviously. I have been working on the crating thing but as of right now she will only lay in it with her feet hanging out, when I close the door I tell her good girl and give her treats and walk away...then she starts digging at the crate and yelping...I also live in an apt so...I put a shirt & toy in there too. But when I open the door she goes bonkers with excitement like I just came home. She gets taken out every night to the park and gets to run without the leash for as long as she wants or wears out. I have sprayed the carpets with hairspray and rubbed tobasco sauce on them (read that on another site) obviously that didn't work either....I am desperate to stop this....I called a trainer but he wants $300 for 4 1 hour sessions which will be my last ditch effort...I don't want to have to giver her away but at this moment it's getting tempting.
Any and all suggestions here would be greatly appreciated as I am at my wits end with her...:(
Thank you, Cheril

Hi,

first of all personal trainers are indeed expensive, but it's a way cheaper to attend to a "dog school" (the place where several dogs are trained together. There are plenty of them and I'm sure you will find one somewhere close to you. In fact it's even better as you train the dog (including very professional advices about your particular situation) and socialise him with other puppies at the same moment.

Getting back to original problem, I would make use of the old, already destroyed carped. Just put together a few pieces (make sure to use very strong thread) and play with it with your new puppy. Do it often but in short sessions - this will make him obsessed over a new toy. Make sure to don't leave the toy after the play (that are general rules, when you want to make your puppy to like a particular toy).
After some time he should be literary crazy about the toy and that should be the right moment to leave it when you have to go to your job.
That should stop him from destroying rest of your house.

Just make sure to remove tabasco odour from the pieces that you choose for the toy ;)

Hi, I think you and your dog need to spend more time together so you can form a stronger bond. Bella seem to have an unlimited supply of energy and you should be able to put that into good use. I agree with Peter about using old rugs and carpet for the time being and getting your dog interested in a toy she will particularly to get there focus on other things around your home. If you can get a personal trainer to help you out, and that's if you find one within your budget, it would really help Bella adjust to living with you. ;)