Hi, My Mini Schnauzer Age 6 Has Pancreatis. The Last

Hi, my mini schnauzer age 6 has pancreatis. The last 6 weeks she has gained 1 kg and is trying to refuse to go on her walks and when she dies go she ends up lying down on the pavement. 3 months ago we were walking up and down hills. She has been tested for cushings and the results were 34 so not high enough to positively diagnose. What should I do now?