How To Cure IBS Suspected Symptoms ?

I always have a bowel movements first thing in the morning, usually within the first hour of waking up. Lately I have been getting nauseous just prior to going to the bathroom, feeling incredibly sick. I run to the bathroom and once I go, I feel fine and the nauseous feeling goes away. My body has also decided that it doesn t want to digest food very well. I am passing a lot of undigested vegetables and grain, including carrot, red peppers, black beans, beets, and whole quinoa. I get some light cramping and pains in my sides and lower abdomen, and my stool is changes consistency all the time from soft and loose, to very firm. But it is never watery or diarrhea. My doctor suspects IBS but has not done any testing yet. Are my symptoms characteristic of a more serious disease, like colon cancer or Chron s?