Concerned about my 2.5 Years old Son

[Aritra]

My son 2.5 years of age is diagnosed with moderate level of Autism. He is very restless , non-verbal and always remains in his own world.We are not able to teach him anything as he ignores /not-listen to us . Not very social ,plays alone and very poor eye contacts with others.So far we have started all necessary therapies (like Speech,Occupational) but not seeing any positive results. As per his chart his lord is Rahu and he is going through Rahu Phase. Not sure how long this phase will continue and will this have any direct impact of his Autism. Below are few details about my son

Date of Birth - 08 Dec 2015
Time of Birth - 15 Hrs 12 Mins 10 Secs
Place of Birth - Saltlake,Kolkata,India

Any help regarding his birth chart is really appreciated. Actually we are very tensed abount my sons condition and dont know whether it will be cured or not. Also how long this autism phase will continue? Any suggestion based on birth chart can be helpful to us.

Thanks
Aritra