Welcome! I'm glad you found us. If you go to the FAQ section at the top, you will find a list of abbreviations we use on this site.
Sorry for all the questions, but your answers will help us help you. What kind of doctor diagnosed your SS? Is he on any medications, and if so, what? What behaviors are you noticing that are troubling? How does he do at school, both academically and with peers? Any developmental or speech delays? Any sensory issues (sensitivity to noises, tastes or textures, for example)? Any substance abuse or psychiatric disorders in the family tree?
CD is generally a diagnosis reserved for the over-18 crowd and ODD is a set of behaviors that is typically fueled by an underlying disorder (for example, autism, anxiety, depression, etc) so I'm a little suspicious you haven't hit on the right diagnoses. When the underlying disorder is identified and treated, the ODD/CD behaviors tend to subside. If your SS has been given stimulant medications for ADHD and is getting worse, I'd be concerned that you're looking at more than ADHD.
Again, welcome. If you answer the questions above, I hope we can point you in the right direction for help.