I am a triathlete, 51, female. I run 40 miles per week. I sit on a bike saddle for at least an hour a day, and I take more ibuprofen than i should...up to 16000mg (8 pills) per day, on a regular basis. I get fairly frequent (once a week, sometimes a couple of days in a row) blood spots on my underwear. This has been going on over a year. No pain or discomfort otherwise, a physical about two months ago revealed I was very healthy (blood work). I talked myself into thinking this was just my old hemorrhoids, which I have had on and off my entire life and through 4 children, or maybe an anal fissure from the bike saddle. It is an extremely small amount of blood. A friend freaked me out with stories of stage 4 colon/rectal cancer. I purchased an occult fecal detection test...first two times, absolutly nothing. Last time a small spot of green in the test area, but not the sort of coloring they described, which would be like the control area...a light hue in the entire area. Do you think I am worrying about nothing?