My son who 11yrs old

My son was under cdc since last year the 1st doctor he was under saw signs and evidence off autism. Also diagnosed him with sensory issues and told us to treat him like a autistic child. (  which we have)

The problem we have now is he went under a new doctor and solely based it only on a school report and very old reports when he was 2/3 yrs old. Didnt speak to any other network support in mu son group. And solely blame me for everything. It has come to light that he lied in reports and to other authorities about my son. 

My son show high signs off been autistic on the lower end and even others have said there is signs. Now because the doctor has lied I feel that a second opinion might be out because he turned othersPensivepecially the school against me PensivePensive.

I'm really at loose ends and now I dont no which way to turn