New here, have a daughter with anxiety

[Artistmom]

As I am waiting on my calls to be returned from the school, the psychiatrist, and our counselor,
I thought I'd seek help online.
My daughter is 11 and was diagnosed with anxiety last Spring, 2016. She refused school for the months of April and May (end of April, on into May until the end) but managed to make her work up and pass to the 5th. Fifth grade was the transition to a new school. The first few weeks were rocky but she made it through and did wonderful until now. She was also put on 10mg of lexapro that seemed to be helping; due to the fact she was worsening.

The same school refusal symptoms have returned. She sweats and shakes, about vomits (she has before many times) and is scared out of her mind. This time, it's affecting her 8 year old sister. It started at Christmas break.
She did so good before. She did well all year! She's been complaining of being very dizzy and I took her before Christmas to have her seen about. They referred us out and of course the appointment is taking forever. They want to do an echocardiogram. Her EEG was normal but they wanted to look deeper. She says she doesn't go fuzzy but that she feels disconnected. Then her hands sweat and she gets flushed. I don't know for sure if that has triggered this anxiety.
I'm very desperate and exhausted. She's been doing so well!
I never wanted home schooling to be an option because I didn't want her to think we were hiding and giving up; because things are hard.
I may have to because I came very close to being called to court last year. When I started , we didn't get an appointment until early June. So our mornings consisted of meltdowns. After we used our 10 parent notes , our medical absences were not enough. I would get her up there, but she refused to stay unless I stayed.

That's why I was so proud and relieved when she transitioned to middle school and did wonderful; until now.

There's no bullying. I've had everyone but Sherlock himself investigate. I investigated her phone , everything. (It's just a phone of mine she plays minecraft on).
So here we are, at home waiting on someone to help us with our next move. I'm exhausted and drained. Last time this happened , it almost killed me.

Please, if you have any advice please let me know. Or your experiences. I'm grasping for straws. I haven't slept and my husband isn't being as supporting as he could.
(He is her stepdad but he's all my girls have ever known. He has my stepsons every other week.) They just called and said the next opening is February 7th (Psychiatry).

Sorry so long . =/