I think you should definitely check with the pediatrician. It definitely wasn’t okay for him to leave you empty handed with no information when saying your child has autistic tendencies. I think you are as concerned as any parent should be. As for your question, I have read that the two definitely relate to each other. I would have the adhd specialist hear your input about this and then come to a decision. Either one of these conditions are life-long but are treated pretty differently with one more relying on therapy and behavior modification. I hope that you can get this figured out for your little one.