I'm 25 years old, I have 3 kids, I'm 5ft 3in, I weigh 190 pounds. I have had my tubes tied for almost a year. My period ended on December 31st, 2013. My cycle is usually 28 days. I have been spotting for the last week, and my period isn't due to start till January 24th, 2014. It's been consistent enough that I need to wear a lite tampon. What is going on? Its really starting to concern me.