Extremely dehydrated

Hi everyone! I (31F) recently confirmed that I have an autoimmune disease, and awaiting confirmation of Sjogren’s. In the meantime I’m hoping to get some input. I have abnormally dry skin and nothing I do seems to help. I take fish oil, eat a lot of healthy fats, drink at least 100oz of water a day, drink electrolytes, and moisturize topically. My fingers are always pruned (photo) and my eyes (photo) have aged YEARS in the past year. Has anyone found relief for dry skin? I’m feeling extremely discouraged and willing to try anything at this point. Thanks in advance!