My boyfriend has ejaculated in me several times and my period is now 26 days late, could i be pregnant?

There is a real: Chance if semen gain access in to your uterus as you stated that he ejaculated in you several time.

Yes, you may be : Pregnant. Take a home pregnancy test to find out. 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.