@kmc1124 - I am so sorry to hear what you are going through. I know constipation, but not like yours. I have motility disorder, but not like you. I know what you mean to feel like a balloon.
It sounds as if your major problem is with the left descending colon. Have you had biopsies from that area? There could be abnormal nerve supply. Some children are born like that and will have to have the abnormal part removed.
Let’s hope members with your experience will find your post and offer some information.