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Search for "Special Care & Career Services" on the internet. It is a local charitable organization that assists children with special needs before they are old enough for public school. They may be able to give you direction, help you find out how to get your son tested, and other things. contact your local social services agency to see whether there are governmental services that would help in your situation, whether it is autism or just speech therapy. I hear there are free services for children through the school district even though the child is not yet school age. Finally, research autism and dallas and see if you can find an autism support group; attend and see what you can find out. good luck to you.