I agree with Nanners, I also go through what you describe when I have a partial obstruction. My pain cycles every 3-5 minutes and yes the peaks are unbearable. Chills are common and the pain is also above my belly button to start, then it goes in a band about 10-12 inches high all the way ariound my abdoman and back.
Male, 54 years old with Crohn's since 15 years old, diagnosed at age 46. Terminal ileum resected 2002. 5 months of remission. Crohn's has now been active since early 2003. Had a gall bladder removed Nov. of 2009. Currently on Remicade every 8 weeks, Asacol, Nexium, Iron, B-12 injection every 4 weeks, Morphine Sulfate as needed for pain. Cymbalta for long term pain control. 5-asa Salofalk, Entecort, Imuran and Prednisone in the past.