It is great you've found a medication that helps with anxiety and depression (Cymbalta). Focalin in a stimulant as I am sure you know. The feeling of having a weight on your chest could be a side effect of the med. If you have another day of feeling anxious then perhaps it is not the med for you. Just stopping it and allowing the Cymbalta to work may be enough and perhaps the anxiety will subside again. A trial of another stimulant for fatigue might be in order.