What Leads To Blood In The Stool?

I have had bloody stool for two months (bright red, not every single time I go # 2 but most of the time-also more diarrea than constipation but again not every time), and for a couple days my stool was almost white, light cream colored), accompanied with nausea (which I have sought medical attention for the past two years only to be told to take Omperozle or other anti acid/gas "medication"), and for about the last month I have been getting hot "flashes" at random--but its now consistent (like a hot flash that doesn't go away) and the area from my chin down to above my breasts has turned red and burns/stings. Because I don't have health insurance at this point I would rather know if this is truly something I should seek medical attention for before I pay another doctor to tell me to adjust my diet (steer clear of acidic foods and take antacids--which I have already done). Also I am female, 24 years old, 5.5 ft tall, 138 lbs, had cervical cancer almost 3 years ago and had a conoscopy to remove the cancer.