Christine, I am so sorry for what your daughter is going through. I want to offer some sort of advice but don't have any other than to don't stop looking for answers.

When I was 2, I also got very very sick and almost died, I spent a year in and out of the hospitals...my mom counted over 200 shots, all experimental treatments...I had so many shots that my muscles collapsed. The doctors told my parents that I was going to die. My parents finally went to another doctor. The conclusion was that I had an initial reaction to antibiotics, which caused a yeast infection that had gone untreated and undiagnosed for all that time, and all the treatments given to me in the hospital kept making me worse. This doctor gave me medicine for a yeast infection and I was mostly better within 2 weeks.

Don't give up hope, look into everything, even what might have triggered this in September. It might be a good idea to get copies of all the tests done and review them yourself, just in case something has been overlooked.

*hugs*