Hi,
Hope you are hanging in there. Its tough when they are so little and so sick. I think you are doing some great stuff. Here is something else you can do - clean out her nose completely with a bulb syringe. It will help her a lot. And do this every few hours or whenever she wakes up. In addition to putting Vaporub on her feet, rub some on her chest, back, throat and just a bit on the nose (nostrils) and forehead. It will help her breathe a lot better. I always do that with my kids when they have a cold/cough. If you have a humidifier, use that in her room. If she has a fever, I suppose you could give her some infants tylenol unless your doctor has advised you against it. That may help her sleep a bit better. My daughter had a very very bad cold and cough a couple of months ago when she was 20 months and she screamed all night and we couldn't figure out what was bothering her so much. I took her to the doctor the next day and in addition to antibiotics, my doctor gave her some motrin because she said her throat hurts and the motrin will help with the pain. It was like magic! Check with your doctor though.
Good luck and hope you all get some rest.
Aarti.