Yes mor eprobiotics. I also read to take the probiotic opposite times of the antibiotics. For example if you take the antibiotics 6 am & pm, take th eprobiotics 12am & pm. You don't want them cancelin gout each other!
also have your doctor check with your GI..there may be some anti-biotics that are not suggested for people with UC. I've seem sever lists on this site but not sure if there's any medical guidlines published in this area.
Also try the least potenant anti-biotic first and then go up from there if it doesn't help.