Since surveyed parents who have used heavy metal detox (chelation) tend to report encouraging improvements, I suggest that you look into that as a part of your attempt to improve health.
Remember if your insurance co does not pay for detox--most likely doesn't--don't expect your doctor do want to do anything about it. there are other factors discouraging doctors from messing with detox.
If you'd like to learn more about detox/chelation you could check out the chelation groups here and at Yahoo groups. There are a number of young people with high level autism or aspergers in teh groups.