A recurring cough in a three year old?

At 4 years I was diagnosed with croup. That was horrible. But if it saved my life, it might save your daughter's life, too. You might want to check her with that. I woke up in the middle of the night, gasping for air. They rushed to the hospital. After three days, I was allowed to go home. They treated me with a breathing machine and a mask. The air-like medicine was breathed into my lungs, and I eventually became better. It's my opinion, throwing up and losing your breath are symptoms. Hope she gets better!