Long post warning. Sorry 
Iv posted on Mumsnet before about the issues we're having with DD.
A lot of things are point to her having some sort of specials needs or so we thought.
We've had family, friends & a doctor witness what she's like and these are the people that have pushed us into getting our DD into the CDC. I haven't been able to come to terms with this because the same amount of people that have told us there's something wrong have told us that she's "normal". Iv been constantly rearranging the appointment because someone puts doubts into my mind.
DD does have glue ear so I thought maybe everything is down to that, again questioning things.
Today was her parents evening and her teacher said she's absolutely perfect apart from lack of concentration and not responding straight away when spoken to, her interacting with other child had shown a lot of improvement recently. We got to the part of our concerns and I laid everything out.
DD doesn't speak to anyone other than me from leaving school until a few hours later when she's settled back into home life, she asks people to play but they have to do everything the way she says or she will have a meltdown, only plays with one type of toy if something new comes into house she's not interested unless she can use it as part of the toy she's interested in, she's never watched a full episode or movie as she can't concentrate or is constantly fidgeting, when I'm in conversation with someone she will constantly tap me repeatedly saying mum even if I have told her to wait her turn, if she doesn't get my full attention or her siblings try to interact with me she attacks them, when talking to us she will bull nudge and climb all over us, she has never been able to have a picture taken as she can't give full eye contact, she does a constant monotonous humming sound when playing or concentrating, not much contact from other family members as they don't know how to deal with her, before bed she wants to know what day it will be in the morning and what is happening and then first thing in the morning she will ask me what day it is and what's happening that day, she's been to her school best friends birthday parties and she's got there and acted like she doesn't know anyone there and plays by herself, old sisters friends (playtime helpers) are asking her why her sister is different to all the other kids.
That's just some of the stuff I can think of (there's more)
Anyways the teacher said she's fine at school so she's just controlling us all at home and got us wrapped around her little finger so there's nothing to worry about and the child development centre will see that on their visit to school. 
Now we feel like we're making things up, delusion and failing as parents. I didn't expect her to agree with us but I didn't expect her to judge us.
Btw DD is 4.6
Is it possible to be different at school to home? We don't want to waste people time and will look into a getting help elsewhere if the teacher is right.