There are plenty of alltistic NT able-bodied people who are not 'normal' and many autistic people who go on to do well with our challenges like everyone else. She's still your little girl and just as wonderful (I know you know this, but it's something that many alltistic parents struggle to hold onto when they are barraged by such negative messages about it from everywhere).
As an autistic adult with autistic children, my top recommendations is talk to your GP if you feel it will help, looking into floortime and sensory diet as a way you can help her development and learn more about her particular needs, and google things from autistic adults (Ask an Autistic is a great starting point) and if at all possible, let her connect with autistic adults (representation is important for everyone, a lot disabled children discuss thinking they would be cured or die before adulthood because of lack of it, both of which are distressing).