My husband also suffered from acute abdominal pains (I’m not sure how swollen his stomach was though) after his release from the hospital. He ended up with a bowel infection which was diagnosed by a stool sample. He had severe diarreah along with vomiting too. Don’t know if this info will help but I know how much I rely on reading what others are dealing with and how they are coping. All the best to you and your family.