Hello, I am a 24 year old female - - around 10 days ago, I noticed some changes in my bowel habbits, I would need to go to the bathroom more than often and I havent had a normal stool in 10 days. I feel that my stomach is always active, and I have a lot of gas. I did a stool culture, urine culture and blood tests, and they were all normal, and two days ago, I noticed some red in my stool. I am really worried, I have been feeling this way for 10 days.....How long should it go on before I would have to worry? Please help, could they be signs of colon cancer?