I am 26 years old, and my period is 6 days late. how likely is it that i am pregnant? or is there something else that could be causing this?

Pregnancy depends on: If you're sexually active. If you're sexually active and not using protection, i'd say the chances of a late period being a pregnancy are pretty high. Menstrual cycles can be erratic for a number of reasons, however. If you're late and sexually active, take a home pregnancy test.

possible: Anything is possible once you are late for your period if you have been sexually active. However, the probability will depend on the frequency of your periods. Do you have regular periods? How far apart? But if you are worried a pregnancy test could answer, if not see your md.

Take home pregnancy: Test if sexually active. Reasons for missed/late periods: low body weight, obesity, marked weight ^ or v, over-exercise, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems. #1 reason is pregnancy.