Hi N.,
I'm sorry you are going through this! You need to know that there are two schools of thought about autism. One says it is a mental disorder and you need therapies to help your child cope, but there's not much you can do. The other school of thought says there are underlying medical issues that can cause autistic behaviors.
We were where you are at 7 months ago with my son. Fortunately, we are with Dr. Bain for a pediatrician and she put us on an alternative route, as most doctors say autism is a mental illness and there is not much you can do beyond therapy. Some doctors are finding that kids "on the spectrum" have metabolic disorders and their immune systems and metabolic systems are out of whack. We performed metabolic lab tests on my son and have been doing a gluten and dairy free diet with him since May, in addition to custom vitamin supplements. His sensory issues have improved immensely!!! His biting, hitting, and constant need to wrestle and bump are mostly gone. We can drive over speed bumps without him screaming in pain. He sleeps through the night most nights now and we just returned from the pediatricians office with all three kids and I'm not mortified by his behavior.
If your son is always craving the same foods, seems to have stomach pains, has dark circles under his eyes, eczema, or other signs of allergies and food intolerances, you'll really want to read more about the DAN (Defeat Autism Now) approach and find a doctor in the area who will look at his metabolism and immune system.
Faye Elaje is a wonderful nutritionist in the area, who does a lot of the testing, custom vitamins and nutritional support. Her website is http://www.glutenfreedallas.com
I have also been reading about Dr. Amber Brooks, a new DAN doctor in the area and have seen some posts from her in some yahoo groups:
http://www.dramberbrooks.com
Her website has some good information about how this all can link together.
From a therapy standpoint, you'll want to make sure to find an occupational therapist familiar with sensory integration/processing issues. You might have to fight a bit with the school district on that one, since traditional OT will focus mostly on fine motor skills. If you have private insurance that is good, I'd strongly suggest Our Children's House at Baylor. They specialize in speech, occupational and physical therapies for kids. They all worked very well with my son and handled his difficult behaviors with a lot of patience and have helped him greatly. My son will be three next month and we've been undergoing his evaluations with the school district as well, but the OT who evaluated him couldn't answer any of my questions about sensory integration.
The Out of Sync Child is a great resource for you for the sensory issues. Here are a few great ones for the autism piece of it:
http://www.amazon.com/Healing-New-Childhood-Epidemics-Gro...
http://www.amazon.com/Changing-Course-Autism-Scientific-P...
http://www.amazon.com/Healing-Preventing-Autism-Complete-...
Mostly, you need to know that you CAN help your son! You are at the beginning of a long road, but there are several moms in the area, yahoo groups, blogs, books and so much out there to support you. If you need anything more, please feel free to contact me and I will help as much as I can. There is so much more out there in terms of resources, but I'm sure you're already overwhelmed with all you have received. Your family is similar to mine and your post could have been written by me. I'll keep you all in our prayers. Best wishes to you and your family!!!
B.
http://mommy3adventures.blogspot.com