I'm expecting to have my menstruation today august 05, 2013 but there is none. am i pregnant?

Maybe (not) . . .: Take a home pregnancy test. While i can't tell you what's available in the philippines, pregnancy tests are available w/o prescription here in the states. Best way to determine whether you're pregnant or not is to take test as directed at least 4 weeks after last menstrual period. By the way, this assumes you've been engaging in unprotected sex. If you don't want to get pregnant, use a condom.

Use home pregnancy: test to know. Reasons for missed /late periods: low body weight, obesity, marked weight gain or loss, over-exercise such as in endurance athletes, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), travel, hormone irregularities, drug use, medications (i.e., birth control) or med problem (polycystic ovary syndrome or Asherman’s syndrome. #1 reason is pregnancy.