Oh bless you, I know exactly what you are going through. About 10 days ago my son took his 7 month old son to the out of hours doctors. They said his cough and lack of interest in food was just a chill and to give him calpol. Next morning he was worse and they took him to their Doctors who sent him straight to hospital. He had bronchitis, he was tube fed and was on oxygen. Happily he is now home a little pale and not eating quite so much but on the mend.
So frightening when they are so young and cant tell you. All you can do is be there for your family. Fingers crossed and hugs for Gran!