My neighbours son is Autistic and the parents are divorced (sin issue number 1)
I have reviewed some symptoms and signs,
1) language skills
2) Play and imagination
so ask yourself honestly these questions
1) did you read to your child regularly, speak to them numerous time through out the day? Such as when you are cooking,
example; Mommy is making supper now, we are having this or that etc.. It might sound simple, but it does teach language
2) what did you do for entertainment, was it TV, and video game focused? Or was it puzzles, books, literature, arts and crafts, puppet shows etc..?
3) Did you take them out 1-3 times a week to a park, swimming lessons and the likes ( this is something I will be doing myself very soon, I have been ill and tired-serious thyroid condition-one of the beasts from the abyss) this would encourage interaction with other kids, and teach play time
4) What condition was your marriage or relationship in? Was it focused on success? Did you focus on what things you really did not need? Like a larger television? ( these things require lots of money which require more then one income to support it, which would then take time away from spending with your children)
Ask your self these questions and be honest to yourself, and if you are honest and know for a fact, that you are indeed a cause of your childs issue, why not turn things around for the Lord, and teach other sinning parents their need of doing things differently so that they do not make the same mistakes you did.
Part of taking Christ as saviour is recognizing you are a sinner, you need to recognize this to be saved by the blood of Christ.