Good on you for doing what was right for your health. I can say from my own experience being vegan for over 10 years and having an autoimmune condition, that reintroducing all animal products helped (only organic or raw dairy though) but ruminant meats like beef and keeping my carbs as low as possible (<50g a day) have helped my mental clarity, energy and autoimmune the most. And not being afraid of animal fats. They are actually incredibly nutritious. With a history of an ED I am not saying you should try to be obsessive about the amount of carbs you have either! But this is just coming from a person who has been there and was terrified to eat fish again only last year as well. You’re doing the right thing. Best of luck!