Sorry to hear that. I certainly understand the desire to seek answers but unfortunately it looks like thimerosal in vaccines is not the culprit - this study notwithstanding, there's really no credible evidence in support of that theory. Perhaps someday the cause will be known, and treatments available, but for now it's a bit of a mystery.
When the causes of autism are not known, there is no credible evidence supporting any cause. Are you suggesting genetics, or is the correlation between autism increase and mercury-laced vaccines something we can afford to wash our hands of. I am a father of a child born in 2000 who had mercury in his vaccines and he has been diagnosed with Asperger Syndrome, a high-functioning autism. I will investigate any and all possible causes, and certainly wont be dissuaded by someone who visits a couple web sites and ordains this a non-issue.