Two weeks ago 'period' arrived (a week early) - lasted seven days and was no more than brown spotting. spotting has started again. why could this be?

See answer: Every woman will experience an irregular period from time-to-time, and though, in most cases, they aren't dangerous, it's important to figure out what's causing the irregularity. Common causes include stress, travel, dieting, excessive exercise, illness, or any other disruption in your usual daily routine. If irregular, abnormal periods persist, then should see gyne for further evaluation.