I suggest you study reward and reinforcement ProAgonist.

http://en.wikipedia.org/wiki/Reward_system

This wiki article is just an overview. You can Google much more.

It appears from your posts, that you are reinforcing your anxiety. And that this may be due in part to the dopamine actions of the Ritalin you take. Patients do become anxious on methylphenidate, and it is a well known side effect.

I hope that your therapist can help you with this, as it is really too complex to do here on the internet.

I noticed that you changed your signature too....your last one said you were taking Omega-3's and now it says you are planning to? What is up with that? As you change your brain for the better with Omega-3 intake, you WILL notice MORE side effects from the Ritalin. This will be a signal to taper down to lower doses, or eventually no longer need it all.

Have you read Dr. Amen about changing your brain, and helping ADHD? You might want to get his books at your library. His ADHD one is very interesting.

http://www.additudemag.com/slideshow/61/slide-1.html