I can't remember if you've had a consultation with a surgeon or not. Honestly, if I were in your shoes, I would. I mean, that's a heck of a lot of medication to be on that doesn't seem to be working, and given that you've got osteopnia, pred would scare the crap out of me.
At any rate, I hope you feel better soon.
Status: Remission since May 2009!
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Diagnosed with pancolitis on 1/30/09
Current meds: Apriso (4 0.375g pills ONCE!! daily), mesalamine enema twice weekly, Natural Factors Ultimate probiotic 12/12 Formula, OrthoNovum, multivitamin.