Januvia and second time

I have felt poorly since October 2006. Sugar levels ranging from the 450-550 range. My G.P. who is a fantastic dr. put me on Januvia in January of 2007. Range of sugar levels did not change much Sent me for blood work found many abnormalities and in March 2007 I was diagnosed with a bone marrow plasma cell cancer call multiple myeloma (not a side effect of Januvia I'm sure). I am I'm the hospital now for a second time because of severe abdominal cramping. Looks like lower bowel problems. Have not been on Januvia for five days now. ***************My right shoulder feels better, I can raise my arm above my head, no night sweats, no bloody nose, my eczema is clearing up, no pain in joints or rest of my body (thought pain was associated with cancer which is considered inactive since April 2008, I have slept through the night, no pain meds for the last three days, no nightmares, no stomach pain, no coughing, chest not feeling congested, I can get out of bed w/out having to stand for a few minutes by the bed-side because of dizziness, not feeling like a truck ran over me in the middle of the night in the last three days, and most of all I have more energy. To many side effects !!! All of these side effects I thought were a possible result of my cancer although my oncologist did not think so and we still believed that there was some other underlying problem(s). THE UNDERLYING PROBLEM(S) IS JANUVIA !!! Thanks for reading. God Bless You All. Great Health to All.