I have the same problem with my mutt Izzy. (my boxer Smoke sleeps through it) she goes nuts... panting & pacing and won't stop. I did some googling, and finally came across a site that had the "Thunder Shirt" on it. No kidding... well, I don't have the money to fork out for one of those things right now, so I have invented my own lets say... I put a snug fitting t-shirt on my Izzy and within minutes, she starts to calm down. I works with the pressure points in the dogs chest & back. And a little bit of doggie massage. I also found the T Touch wrap (via google) wich is done with an ace bandage.
You must think I'm a nut

but it has worked for me!