Thanks everyone. She seemed a little better today, she had a terrible nights sleep but had a good 2.5hr nap this morning and has been much brighter since then.
She was prescribed a ventolin (sp?) puffer with spacer at one of the GP visits but it didn't help much. The vaporizer doesn't do much either, it helps when she's stuffy with a cold but doesn't do much for this cough.
Last time we went to the GP they suspected it was caused by the excess drool running down her throat. I also thought that was why but now I'm not so sure, especially since she sleeps on her tummy and it wouldn't be running down her throat.