Period 7 days late. no symptoms. took pregnancy test at 5 days late = negative. i am 100% normal 25yr old girl. does not take any meds. am i pregnant?

Late period.: 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. Could repeat HPT but most likely not pregnant