By now your dog associates the kitchen with being left alone. I sympathise with your situation with both you and the dog being left. Try to stick together. I would suggest that you advertise for a dog walker, there are a lot of people who walk dogs especially for people who have to work all day, but love the companionship of their dog in the morning, evening, and weekends. The charge is usually quite reasonable for a daily walk. As you say you are willing to try everything, this would be well worth trying. Hope things work out for both you and the dog. By the way, what is her name.