Hello I am kind of getting worried because I have had my period for 13 days now. It was kind of heavy the first 4 days, then it slowed down to spotting but now its heavy again. I'm worried because my period usually only last for 5 days... but I counted and today is day 13!! I am not on birth control, and I haven't been on it for a while. I really don't know what else it could be.... any advice???