Dear Mr. Asbjorn Ottar Moldver,
I would try our homeopathic Anxietrex and some Chill Out Chews to reduce the anxiety. Anxietrex can be added to the water daily for several weeks if necessary, and Chill Out Chews 15 minutes before you plan on leaving. You could also leave some classical or relaxing music playing when you are gone.
Do you put her in a crate? It should be big enough for her to stand up and turn around. Sometimes dogs feel safer in their own little cave. Putting a blanket over half the crate can make it seem more secure. Make sure she can't chew the blanket. It would also be helpful to provide a Kong toy with peanut butter or treats inside to provide distraction.
I would also suggest that you feed a high quality grain free diet. You would want to avoid a diet with artificial colors and preservatives. A lower quality diet can make a dog more hyperactive.
Also provide adequate daily exercise. Excess energy makes it harder for a puppy settle down. Please let us know how you do.