Ouch, I understand that horrible pain. Have you tried diet? I used to have terrible bloating and blockages and after going on the lowFODMAP diet the problems completely cleared up. I've posted quite a bit of information and links on the diet on the site.
My pouch failed because of pouchitis and other problems. I'm currently in hospital in Cleveland covering from the K pouch surgery. To early for me to say if it was a good decision over having a permanent ileostomy, but so far I would say it is.
Who is your doctor at BI?