Am i pregnant? had sex while on period. successfully used pull out method along w/ condom. had no period the next month. bad stomach pains & fatigue.

Pregnant?: If your description is correct it is very unlikely that you are pregnant, but the best way to be sure is to go and get a home test kit and check a first morning voided urine specimen.

Take home pregnancy: test to know. 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 (i.e. PCOS). #1 reason is pregnancy.

Unlikely, but test: to be sure. Most women are the least fertile during menstruation, and, in addition, you reported that your partner used a condom. Sometimes stress will delay a period and then there can be feelings of lower abdominal fullness as well. Please see your doctor if you are not feeling better in a few days.