Sounds like what I think of a bowel spasm. Does it feel like a sharpish charley horse pain in your bowels? If so, there are antispasmotic medications you can try. I was prescribed one that you put under your tongue which is supposed to give quick relief. Darn, but I can't recall its name. There was just a thread about antispasmotics that might give you some ideas or perhaps, if you call you doctor they could set you up with something.
UC diagnosed 10/05, first symptoms 1983
asacol 12/daily and rowasa as needed
Trying out Culturelle Probiotic
past rx: colozal, lialda, canasa
i can't complain, but sometimes i still do. lifes been good to me so far. -joe walsh