Could it be that your Addison's and Cushings are not well treated? You do see an endocrinologist regularly, right? It seems to me that he or she needs to work on your case in depth, taking it all very seriously. In complex cases like yours, it sounds like you need to be admitted to hospital where they can run all the tests, draw blood etc... at once and have you there in one spot so you can be seen by a variety of specialists, getting everyone on board at once.
Take a look at your medications on line and check out the side effects to be sure they aren't causing some of your symptoms...which they undoubtedly are. Drugs come with plenty of side effects! Often the cure is worse than the disease. The squeaky wheel gets the grease.