anyone suffering from low sodium or addisons disease?

i have addisons disease which is an autoimmune disease causes low blood sodium. i am having a hard time keeping my sodium up. low sodium causes nausea, vommiting, bad fatigue and extreme dehydration. i have been having to get iv fluids every 5 days this whole pregnancy to stay hydrated. dr says water is washing out and not absorbing since there is no sodium in it. just curios if anyone suffera low sodium abd how you are treating it. i drink sports drinks, drink pickle juice and eat salty foods and it doesn't help much.