Can she get some Rescue Remedy? I use it for one of my dogs who is afraid of thunder. It doesn't completely allievate the problem, but it does take the edge off enough that Pingo can relax a bit. I just fill up the dropper and put the liquid down Pingo's throat. If you have some notice that the storm is coming, it helps to give a couple doses prior to the storm starting.

Some dogs feel safer in a crate or confined space when they are scared. Pingo makes a cave under the couch, but a crate would work even better. A kong or highly prized, long lasting chewy helps too--gives some distraction from the fear.

Try not to coddle her too much. It will only reinforce the behavior. If acting scared gets her positive attention, she will continue to act scared. Her people should act like everything is normal, as much as possible. She will respond to their behavior.

Good luck!