Stopped using nr in july had a period then in of august had sex while on my period (he didn't ejaculate) and my period is late for sept am i pregnant?

Take home pregnancy: Test to find out. Missed/late period: low body wt, obesity, weight ^ or v, ^exercise, endurance athletics, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, perimenopause, just starting menstruation, hormone irregularities, drug use, meds (i.e., birth control) or medical problems. #1 reason is pregnancy.