What can mimic lupus, ana and sdna r both neg but have all the same symptoms including rash pain brain fog ocular migraines fatigue ?

Connective tissue dx: The symptoms you describe can be on a spectrum for connective tissue diseases. You should work with your physicians to get to the bottom of it. You may need to see a few different specialists to work out your symptoms. I would start by seeing your primary care doctor and take it from there. The physicians most familiar with connective tissue diseases are rheumatologists and dermatologists.

Fibromyalgia: Fibromyalgia can cause these issues other than the rash. I urge a rheumatologic opinion.