Steamed

I am sitting here waiting for my tiny bathroom to fill with steam so that I can take Miss Nora in there and exorcise the deamon in her lungs. We were free of any kind of cough the whole time we were in Florida, but as soon as we got home it came back. Last night at midnight she woke up with a terrible croup-y cough that breaks my heart. We took her outside, and did what they say to do and it helped, but I slept the fitful mother's sleep that was interrupted several times by her sad barking cough.
I took her to the allergist today, sure that he was going to tell us that we had to get rid of Vince, our beloved cat, but alas the tests were inconclusive. Yes, she has a slight allergy to cats and dogs and pollen of some sorts, but it is too cold for pollen, and the pet allergy is not that bad. So she is taking this non steroid thing that should help her breath better (of course my mother in law is on the same medication and she says it doesn't do anything for anyone anywhere so I am wasting my time and I should go directly to allergy shots every two weeks like she did when she was a kid because she had/has the worst allergies of anyone anywhere. Seriously, who won't anyone just allow my kid to be sick and not tell me how much worse they have had it?).

10 minutes later.....

The steam shower did approximately nothing to help her. She is kind of sleeping, but continues to cough and cry.

What do I do here?
The last time I took her into the doctor for a walk in visit when she had the croup the doctor listened to her chest and shooed me away telling me Abby had pink eye and that Nora was fine (it wasn't my regular doctor). I know that this gets better in the morning, but my kid can't seem to get all the air she needs right now and it stresses me out. Am I totally neurotic if I call the pediatrician tonight? Will I hate myself tomorrow if I don't call tonight and I take her in tomorrow to find out I should have called? Will this just correct itself? Why is this so difficult?