My last period was sept.4 an i've been experiencing light bleeding. i had sex on sept. 9 an today is the 16th an im actually bleeding heavily. my tubes are tied.?

Low chance of preg: 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. These are variation of a normal process