I found this for you from the NAS, regarding Aspergers it might be helpful to you to have a read and see if you think it describes your dd well or not.
The characteristics of Asperger syndrome vary from one person to another but as well as the three main areas of difficulty, people with the condition may have:
love of routines
special interests
sensory difficulties.
Love of routines
To try and make the world less confusing, people with Asperger syndrome may have rules and rituals (ways of doing things) which they insist upon. Young children, for example, may insist on always walking the same way to school. In class, they may get upset if there is a sudden change to the timetable. People with Asperger syndrome often prefer to order their day to a set pattern. For example, if they work set hours, an unexpected delay to their journey to or from work can make them anxious or upset.
Special interests
People with Asperger syndrome may develop an intense, sometimes obsessive, interest in a hobby or collecting. Sometimes these interests are lifelong; in other cases, one interest is replaced by an unconnected interest. For example, a person with Asperger syndrome may focus on learning all there is to know about trains or computers. Some are exceptionally knowledgeable in their chosen field of interest. With encouragement, interests and skills can be developed so that people with Asperger syndrome can study or work in their favourite subjects.
Sensory difficulties
People with Asperger syndrome may have sensory difficulties. These can occur in one or all of the senses (sight, sound, smell, touch, or taste). The degree of difficulty varies from one individual to another. Most commonly, an individual's senses are either intensified (over-sensitive) or underdeveloped (under-sensitive). For example, bright lights, loud noises, overpowering smells, particular food textures and the feeling of certain materials can be a cause of anxiety and pain for people with Asperger syndrome.
People with sensory sensitivity may also find it harder to use their body awareness system. This system tells us where our bodies are, so for those with reduced body awareness, it can be harder to navigate rooms avoiding obstructions, stand at an appropriate distance from other people and carry out 'fine motor' tasks such as tying shoelaces. Some people with Asperger syndrome may rock or spin to help with balance and posture or to help them deal with stress.