I have random red to brown spotting/discharge a week post the last date of my previous period. The spotting has continued for almost a week and hasn't stopped - though it's not "heavy spotting" This is about the 3rd time in the past one year I have gotten this issue. The last time I was on antibiotics medications due to a dermat issue. I have recently shifted cities, could the weather change cause this? Are there any other reasons? How can this be curbed?