Light cramps in abdomen and rectal bleeding no constipation, diarreah. i drink plenty of water... i heard it may be an early pregnancy symptom?

See your doctor: Rectal bleeding is not a sign of pregnancy. It can be related to constipation or polyps. It may be a minor problem or a serious problem. Please see your doctor and get yourself checked. Cramping can be due to constipation. Cramping if pregnant requires a check-up rightaway.

Not usually: Abdominal cramping and rectal bleeding can be due to several problems. The most important of these is rectal cancer. Rectal cancer in patients under 50 is the only group in which the incidence of rectal cancer is rising. Most likely you have a benign easy to remedy problem, however you need to make sure. You should see someone who will examine your abdomen, rectum and felxible sigmoidoscopy.