I'm having really late period heavy cramps and very thick blood clots?

Pregnant?: Commercial home pregnancy tests will turn positive about the when you would be 1 week late on your period. Repeat the test at that time.

Causes?: 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 for missed period is pregnancy.