Sorry to hear it is not working for you. I took several meds and different combination of meds for years before discovering what combination worked for me, though I have Crohns and not UC. After seven weeks you should have seen some sort of change but if not then maybe talk to your doctor to try something else. They might want to do come tests prior because even though you might see or feel a difference, there might be changes going on in your gut.
Let us know how you get on
Vern - IBD Team Member