1st of all, I get plenty of fiber (being Asian, my family emphasizes eating fruits and veggies), and I've stuffed myself with prunes for the past 2 weeks and things have only gotten worse. Since feeling bloated, I've cut down on my food intake by 1/2.

2nd of all, I've upped the amount of exercise I get (usually I'm very dormant, I guess) - 30min - 1hr, I'd say, of walking after dinner or playing tennis, whatever.

3rd - I drink like 6-8 cups of water a day

my doctor told me it's probably diet, despite me explaining my situation. I'm afraid it's colon cancer, hemorrhoids or something more serious - what should I do? I don't think I can stand another day of this, it hurts so much! I can't even sit down because that hurts too (constant pain, almost!) - my whole body's sore and I can't walk normally.

medications or supplements that are new?
depression/anxiety
change of diet
stress

If it doesn't improve, I'd see a GI specialist...they made need to do a colon study on you. You could have a bowel loop or obstruction, but that would probably involve vomiting, too. Good luck & take care.

How old are you?

Do you have a family history of colon cancer?

Do you take any medications that would be slowing down your bowels, like a pain medication?

Various opiates, (for pain) can just about stop the bowel from working. Hydrocodone, a common ingredient in prescription cough medicine, can really cause problems for some people. Have you been taking anything like that?

Have you tried taking a laxative like Milk of Magnesia?