Until about three weeks ago, I suffered from constipation all the time (at least five years). All of a sudden I was having cramps, diarrhea and very loose stools - daily.I've been trying to come up with a change that could have resulted in this. The only thing I can think of is too much vitamin C, addition of turmeric & bromelain at the suggestion of my chiropractor and glucosamine sulfate. My pain meds haven't changed. I take Ultracet, 600 mg Ibuprofen and an occasional Mobic for arthritis.I read last night about the symptoms of colorectal cancer and my symptoms are similar.Should I see my doctor or assume this IBS of mine has just changed?Thanks in advance.Nancy