Jade,
I'm gonna give you a buch of information here to look at. It should help you recognize the different signs of Autism. If you feel strongly about this keep pursuing it! Don't let them stop you from getting the diagnosis if you truly feel your child is Autistic. There is a lot of information here, some that can be useful things you can do at home even if you don't have the dx and want to do something to help your child. Anyway, here it is:
Beginner's Guide to Autism (Information Package)
How To Understand People Who are Different [url="http://www.nox.com/aut/howto.htm"]http://www.nox.com/aut/howto.htm[/url]
Positive Approach to Autism [url="http://www.autistics.org/access/support/family/terrible.html"]http://www.autistics.org/access/support/family/terrible.html[/url]
Autism Checklist [url="http://www.geocities.com/EnchantedForest/1142/checklist.html"]http://www.geocities.com/EnchantedForest/1142/checklist.html[/url]
Warning Signs [url="http://www.saveachild.com/warningsigns/warningsigns.htm"]http://www.saveachild.com/warningsigns/warningsigns.htm[/url]
DSM-IV Criteria for all Autism Spectrum Disorders/PDDs [url="http://www.geocities.com/HotSprings/9647/dsm-iv.htm"]http://www.geocities.com/HotSprings/9647/dsm-iv.htm[/url]
Autism and Dev. Delay Resource Catalogue [url="http://WWW.FRS-INC.COM/"]http://WWW.FRS-INC.COM/[/url]
Center for the Study of Autism [url="http://www.autism.org/"]http://www.autism.org/[/url]
Division: TEACCH [url="http://www.unc.edu/depts/teacch/"]http://www.unc.edu/depts/teacch/[/url]
Autism/PDD Resources Network [url="http://www.autism-pdd.net/"]http://www.autism-pdd.net/[/url]
Recommended Reading: A Parent's Guide to Autism by
Charles A. Hart [url="http://comeunity.com/disability/autism/autism_guide.html"]http://comeunity.com/disability/autism/autism_guide.html[/url]
Autism Society of America [url="http://www.autism-society.org/"]http://www.autism-society.org/[/url]
Autism Research Institute [url="http://www.autism.com/ari/"]http://www.autism.com/ari/[/url]
"Autism; A Confusing Childhood Disorder" [url="http://www.mayohealth.org/mayo/9905/htm/autism.htm"]http://www.mayohealth.org/mayo/9905/htm/autism.htm[/url]
Autism Society - Getting Started [url="http://www.autism-society.org/packages/getting_started.html"]http://www.autism-society.org/packages/getting_started.html[/url]
Action Plan for the Newly Dxed (VERY IMPORTANT) [url="http://www.business.gatech.edu/users/bmiddlebrook/action.html"]http://www.business.gatech.edu/users/bmiddlebrook/action.html[/url]
Recommeded Reading: "Let Me Hear Your Voice" by
Catherine Maurice [url="http://www.**********/exec/obidos/ASIN/0449906647/"]http://www.**********/exec/obidos/ASIN/0449906647/[/url]
Please note, this information may not have been
thoroughly researched and therefore can never take the
place of professional help, when required. Please use
as a starting point only.
Take care, and hope it helps!

Diane
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"Act mindfully. Accept entirely. Move strongly. Think softly. Speak beautifully. Live simply. Love completely." Anon