Query: Does anyone know how to soothe a coughing dog?

I love my little Blondie dog, but she's keeping me up all night and that's not a good thing for someone who is still recovering from the flu! (If I don't get 8 hours of good quality sleep, I'm cranky at the best of the times. But 6 hours when I'm still feeling really achy and sore? Eek!)

Does anyone have any ideas how to help a coughing dog? The humidity is incredibly low right now (20%) and it's incredibly cold (-10˚C) and windy. She can't go outside as often as she would like because of the horrible wind and our bedroom is very cold (we don't have any heating in the room and the windows aren't as well sealed as they could be. It was about 55˚F or 13˚C last night!). I'm fairly sure this is the cause of the problem as it happens every time we get very dry weather.

We have bowls of water scattered all around the house, and I've been giving her spoonfuls of honey - my logic is that her throat is dry and a humectant would be helpful - and I did try a little glycerin with her yesterday, but if you have any suggestions, I'm all ears! I'm exhausted and feel so badly for the tiny dog who can't stop coughing!

Thanks so much for the suggestions! We've had the humidifier on all day and she's doing well. The only coughing we've heard is when she comes in from the very chilly outdoors and when one of us comes back into the house and she is overcome by joy (much like when we laugh until we cough). We have the  space heater on in our room as well, so I think we might all get a little sleep tonight! Thanks so much for taking the time to share your suggestions (and Blondie barks her thanks as well!).