6 days late on period and i've had no stress or anything like that but ive done 1 test and it said negative? i always have regular periond.help!

First repeat: pregnancy tests have the potential to return a false negative. The next thing you should do should be to repeat the test again.

Repeat in week: 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.