I'm 16 and my periods have been irregular since I started(when I was12) they can be nothing from a month to 6 months late, and no there is no chance I am pregnant, I've been to the doctors and all they did was send for me a blood test which came back as inconclusive and stuff, I was wandering if anyone knows what it could be? The periods I do get are also VERY heavy, I can leak through a super tampon in less than an hour, they are also VERY painful