Just Diagnosed 9 days ago.any advice on bowel management /frequency /diet on Montinon?

I now wear depends as a precautionary measure, as i always have urgency,especially after a meal sometimes during sleep.i am tired of throwing out clothing. Trying gluten free, eliminating tomates. Decades ago was told I need to 'retrain my bowels due to constant bowel urgency./frequecy. I feel my Pelvic floor musles are affected..