What Causes Severe Nausea, Vomiting And Abdominal Pain?

Question: I have been suffering with severe nausea, intermittent vomitting , abdominal pain and cramping, loose stools/diaoreah, low appetite, eating seemed like poison to my body, for 12 months, spent most of the first 6 months in and out of being admitted to hospital, put on IV anti-emetics to control the sickness as I became severely dehydrated if I did not have it controlled. I did not eat for 10 whole days at one point, I was even vomitting sips of water I took. They did a lot of tests, MRI brain scan, camera down my throat ( showed mild reflux ) , camera up my rectum ( results were normal, but never reached the small bowel )My GP did a Calprotectin test 3 months ago which showed my small bowel to be highly inflamed, he put me on a dose of 9mg a day of a steroid called Budenofaulk ( Budenoside ). I took another Calprotectin after a month which still showed the small bowel to be highly Inflammed. I've just given another, no results back yet. I've started feeling much worse again over the last 2-3 weeks, so sick, can barely eat,very weak, hard to walk around so weak, plus my unintended weight loss has continued...I've lost over 6 stone in the 12 months of being ill. Please help me. I'm close to breaking as no one, no DR ( except my new GP who can only do so much ) have or are doing anything to help me. No one realises how sick I feel, I barely eat as the nausea is so bad...hence why I have lost 6 stone, together with constant diaoreah/loose stools. It's getting really bad again. I also have chronic pain ( Fibromyalgia) to deal with. I just want someone to help me and give me answers. Thank you.

Dear DR, thank you for your prompt reply.
I had a regular Colonoscopy few months ago,plus biopsies, they found nothing. I know that the colonoscopy did not reach the very end of the small bowel though...where the inflammation has been found from a Calprotectin test.
What other kind of Colonoscopy should I ask them to do to see the entire small bowel ? I know there is one that does this.
And...are the steroids I am currently taking, the right ones or the right dose to take..?
Plus, is IM Cyclizine OK to take regularly to ease symptoms. My GP is happy to give this, so am I, I just need affirmation of this. Cyclizine has never given me any horrible side affects...is it OK to take untill other medication starts working..?
Thank you.
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