Has your dog been through any type of obedience training?
Full medical checkup at the vet recently?
Have you contacted a dog trainer or behavourist?
Are there certain things that set her off everytime? Specific things she may be upset by ie noisy washing machine, vacuum cleaner, squirrels etc?
I know someone who had success with the Dog Silencer Pro
when other options/training methods failed for a dog barking due to separation anxiety when left alone.