You should go back to your doctor and describe your symptoms. I'd probably request a rectal med.
Also, I recommed you go to the Crohn's and Colitis Foundation of America website (www.ccfa.org) and read their section about
meds used to treat UC. It's really informative. I don't think you're in the US, but many of the meds they describe are available worldwide.
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
Meds: Apriso (4 0.375g pills ONCE!! daily), mesalamine enema twice weekly, Natural Factors Ultimate probiotic 12/12 Formula, OrthoNovum, multivitamin. Used prednisone (starting dose 40 mg) to get into remission.