What Causes Clay Colored Stool And Abdominal Pain?

I have been experiencing cold-like symptoms for the last few days. My father had the same symptoms and was better after four or so days. Today, however, I noticed that my stool color was a clayish white accompanied with moderate abdominal pain on my right side. Is this cause for concern?

Additional information. I have been drinking plenty of fluids (water and gatorade with the occasional soda) and haven't had any dietary changes. I have been taking vitamin C tablets, Sudafed, and Nyquil. I was in the Bahamas three weeks ago. I have had intercourse with only my girlfriend in the last year, prior to I had been tested for hepatitis and other STDs, all of which came back negative. I also chew tobacco regularly.