Tango does this too. Her problem is the fact that she's a very anxious dog as it is, and at night she listens to different noises very intently to the point that she gets scared/worried (wind, creaks in the house, etc.). She shakes, pants, whines, etc. I just put her in her crate with a couple stuffed toys and a few blankets. It calms her down pretty quickly. She feels safe in there and sleeps through the night without problems. I don't lock the crate door. I close it so that it appears closed, but if she wants to come out later on after she's calmed down, she can.

I also give her Rescue Remedy daily. It helps a bit, but not a whole lot. I totally understand what you're going through. Tango wasn't always this way either, but it's something that you eventually just grow accustom to. Also try not to praise her with "good girl", "it's ok", etc. Good luck with yours! I wish I had some better advice.