Good Morning Ben,
I have a granddaughter with Asperger's. Here are the sx:
Signs and symptoms of Asperger's syndrome include:
Engaging in one-sided, long-winded conversations, without noticing if the listener is listening or trying to change the subject
Displaying unusual nonverbal communication, such as lack of eye contact, few facial expressions, or awkward body postures and gestures
Showing an intense obsession with one or two specific, narrow subjects, such as baseball statistics, train schedules, weather or snakes
Appearing not to understand, empathize with or be sensitive to others' feelings
Having a hard time "reading" other people or understanding humor
Speaking in a voice that is monotonous, rigid or unusually fast
Moving clumsily, with poor coordination
Having an odd posture or a rigid gait
People with Asperger's Disorder can have severe social anxiety, although it is a different type of anxiety then Social Anxiety.
Individuals with Social Anxiety develop severe tension/anxiety as they try to participate in a relationship, wanting to create a relationship but having low social confidence. Individuals with Asperger’s have difficulty with the mechanisms of communication and relationships — having problems with social articulation, emotional expression, understanding verbal and nonverbal cues in conversation, etc.
I hope this helps you in some small way and please do discuss your concerns with your physician.