I suggest that you call the pediatrician who has already examined her and ask for a referral. If he's already examined her and knows of her condition he most likely would not have to see her again. If he does want to see her insist that the appointment be this week or next at the latest.
I also suggest that you won't have to wait long for an appointment. Doctors know how important it is to diagnose these sort of difficulties early. However, if the appointment maker gives you one weeks away, ask her to speak with someone so you can be seen earlier.
Later: It's unlikely that any of us have had a child with this combination of conditions. I urge you to talk with the professionals about what could be wrong. They can give you ball park ideas. They cannot tell you what specifically is wrong until they do tests.
Professionals may not discuss possibilities unless you ask them to do so. Some parents don't want to know and others do. When is your appointment with the pediatrician? This is a question that he should discuss with you. You could also call any of the other therapists and ask to come in to talk about this.
If you've been willing to talk about this, I'm surprised that they haven't been answering your questions. They can only guess in global ways what could be wrong. I suggest no one can be specific enough to relieve your mind.
This situation is a matter of learning how to accept the unknown. See this as an opportunity to learn new coping skills. Perhaps make an appointment with a therapist for yourself to discuss your anxiety and how to accept the not knowing with less stress.