Hey!
I am so sorry to hear he is dealing with that! Unfortunately I cannot legally make recommendations without him being a client especially because he is so little (consent and all that would need to be signed). That being said, ensuring he is getting sufficient omega 3s (DHA and EPA), probiotics, vitamins and minerals through your milk is essential. at this point i recommend he gets it through your breastmilk by you supplementing. You’re doing great! I would add high dose probiotics to your diet along with a greens powder (douglas labs greens and reds) to really bulk up your milk with nutrition.