Hi,
You have discuss such issue with your doctor, that may be happen due to side effects of medicine, Discuss with your doctor freely and tell them all the symptoms you feel. Keep away your self away from dairy product and other junk food.
I would talk to your doctor. Your pain could be many things. Also your dizziness should be checked out. Are you sure your blood counts are back to normal? Is the dizziness related to the times you take your medicine? I found that with ulcerative colitis that low fiber and no dairy worked best for me. I have a blog about U.C. http://www.nurseguy.com/colitis-blog.html
Siri, have you discussed the on-going issue with your doctor, or asked about dietary help?