welcome lynn

sorry your son is going through this and it sounds very complex, your son seems to have got locked into an altered state which, must be very frightening for him, also his emotional body will be in pain. this he will feel , in his stomach, chest, throat ,forehead and top of head also other points , this maybe be helped, with warmth and massage, and yoga, also talk and chalk therapy drawing thoughts and feelings and talking them through, with a trained therapist may also help, stick with the health professionals with this with a holistic approach, theses things can take some time

hope this helps

P .S he probably dose not feel much like eating supplements can only help omega 3/6 a must