I have struggled to get pregnant for over 20 years. no luck. in 2 weeks i am 40, my period is 9 days late. peri menopause or could i be pregnant?

Other reasons too: Take a 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 pregnancy.