I haven't yet been dx with IBD, but I can tell you that my right side is way worse than my left side. I asked my rheumy once about that; he said that is typical of inflammatory arthritis, IBD-related arthritis included. He didn't know why, but many patients tell him that one side is more affected than the other. I still hurt in my joints on the left side, but not as bad as the right. Curiously, the GI pain I have is also on the lower right side.
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan