Why did my stomach pain end up in hospital admission?

Hi doctor,

I have been admitted in a hospital for three times in a year with a complaint of constipation. I did not poop for four weeks. There was no fecal impaction, but my intestines were not moving. They gave me an NG tube to clean me out. My GI doctor prescribed me so many laxatives, but nothing worked. I had an endoscopy and colonoscopy. They showed nothing, but a very stretched out colon and intestines. My doctor advised me that I can make my colon and intestine, normal with strict diet and laxatives. But still, I cannot produce a bowel movement without laxatives. If I do not take laxatives, then it will result in constipation. I have been diagnosed with IBS-C. I also get random vomiting. I have been on anti-reflux and nausea pills. I am scheduled for small bowel manometry, antroduodenal manometry, motility testing along with an endoscopy and colonoscopy. How long will this testing be? Do you think that another endoscopy and colonoscopy will help my condition? Though I had stomach pain for many years, why it ends up in hospital admission nowadays? Currently, I am on Ondansetron 8 mg, Metronidazole 500 mg, Dicyclomine 20 mg, Promethazine 25 mg and Lansoprazole.