Hi lovely
Waiting is the worst part of what you will go through, well, that's easy to say now I am over my experience. I can look back now and remember the worrying was the worst part. All the advice above is fantastic, so for my part I will let you know that you have already been overwhelmed until now, with all the energy going into taking care of your daughter. Some would say this is time now to focus on yourself, and to reach out to the complete strangers who will come into your life and help you through. That is what I found here on BCNA and the community and information provided. I was not shy about asking and searching for help. All the assistance I got, whilst isolated myself, at the time, came from strangers. The more I searched for answers through the right sources, the more relief and able to cope I felt. All humans are different, so no one will do anything the same way.
I was able to focus on myself because I don't have children. There may be some one who lives near you who can relate to a child with Autism, and provide you with information about support networks. Or may-be, you can create a new support network via this experience yourself. (I work with a lady who is young with a child with Autism).
Fear is an ability for the subconscious mind to dwell on a subject for too long, toward the negative. It can cause insomnia, and dominate your time that at the end of the day, will add to the situation. I learnt about Mindfulness, and the off-loading process to others, how to shift my focus and allow my body to remain in a calm environment, which has taken years of practice.
I have the "Natural Worry Gene" and so have since my Surviving Cancer, for 6 years, have learnt to Meditate (well, trying to!), via U Tube and it has all helped.
One day at a time, is all you need to think of, as worry about the past and future, won't help.
Find stuff you like to do that is good for you, like doing a jigsaw, watch a movie, yoga stretches, painting, colour-in. Take deep breaths and count backwards, whatever works.
Good luck, and I hope you keep returning here, for great solutions.
Cheers from Bel