I'm 26 and have had irregular periods for about 8 years now. In May I was 3 weeks late and now I'm bleeding with no clots at least a week before I'm due to start. The Docs are trying to figure out if I have PCOS for sure. Does anyone know what could cause this?? I am in college and looking for a job so I am stressed out. I have no pregnancy symptoms and use condoms when having sex. Can anyone help???