A colleague of mine is a huge supporter of Dr. Sherry Tenpenny. She is a specialist who deals with autism from a more holistic approach. Her work is being highly regarded among even non-osteopaths. She has written many articles and her practice is flourishing. Please check her out. I realise that she may not be near you, but might be able to direct you to someone in your area that can help where traditional medicine leaves you hanging.
http://www.osteomed.com/