You need to get this under control ASAP, as it will get worse, if left untreated. Pred may be a necessary evil but only
for short-term use.
Long term if you do not respond
to asacol/ pentasa there other other options eg. azathioprine. I would also recommend avoiding dairy (although you should take calcium suppliments and yoghurt is ok as it is live), seeds, nuts, the skin of fruit and veggies - as this can irritate the colon.