tricky week back to school and parental anxiety

Hello all- I'm new to here. My five year old begins formal assessment next month after along wait.  Senco and myself both believe she is on the spectrum. She is in year R. This week she has been particularly sensitive to noise. Lots of night waking. Also unable to concentrate- misforming letters she had already secured and not reading as well as she can usually. Her brain seems a bit scrambled. 

I feel constantly anxious about her and very much alone on this journey- which is why I'm here. I'd love to hear from parents in the same boat. 

Many thanks.