Stomach aches while on accutane?

I have been on accutane for about 2 months. About three weeks ago I started to experiece stomach aches similar to the feeling of diarrhea. It came on extremely fast with no prior warning and the aches come and go several times a day since. I am very worried because I know that accutane has been linked to inflammatory bowel diseases but I wasn't sure if I could get one so soon into my treatment. Other symptoms I am having include a strange stool. It comes out in several little soft pieces(sometimes green) and comes with strange white pieces in it. My stomach also gurgles occasionally. My doctor had me stop accutane treatment for a week and the aches still did not go away. Now I am very concered, could someone please tell me what they think is wrong with me?