Late Onset Congenital Adrenal Hyperplasia

Hi everyone, I have been on this site for a little while now, but despite my diet and exercise attempts, I was still gaining weight. I was sent to a dietician, who tailored a food and exercise plan for me, and it still wasn't working, so she sent me to an endocrinologist. The endocrinologist finds that I have late onset congenital adrenal hyperplasia, meaning my adrenal glands aren't doing what they are supposed to,and sometimes it masks itself as Pcos, which I was told I had back when I was 18. I go Wednesday for my ACTH test, and they are going to inject me with synthetic hormones and draw my blood every 30 minutes for two hours to see my cortisol level so I can be on my way to lose weight and feel like myself again. Anyone else have problems like this? I was literally on a 1200 calorie diet with low carbs and high protein and still gaining weight. Right now I am still very frustrated, but getting by. Does anyone have any suggestions on how to bring some type of encouragement to this? I try so hard to stay on the positive run but it seems like nothing is going my way.