I am 25 and the last 3 months my periods have been weird. They have been heavy going about 6 days like normal. I started on March 27 and then again on April 18th. I have been having severe mood swings, and headaches. Could this be pregnancy or something else? I havent been feeling like myself lately. I went to tthe dr but he just overlooked everything and said its stress but I really dont think this is stress causing me to do this.