Brown discharge before and 2 and half days after menstrual cycle. i'm worried ! this is the third time now.?

Can happen: Your periods occur because of changes in hormones within your system. While a lot of women have a period every month around the same time, there is variation from cycle to cycle. Ie – a period may come on a few days earlier or later and maybe heavier or lighter depending on the endometrium lining. It may come continuously or with intermittent spotting. dark blood means old blood. not an issue.