Abdominal pain and bloated, swollen breasts, awful back(mostly lower back) and neck pain, foul smelling stool, no chance pregnant. what could this be?

See a doctor: When you say no chance of pregnancy I assume you have never had sex. Anyway there are a lot of possible explanation for your symptoms and you probably need to see a doctor to start getting to the bottom of it. Also, I'm always intrigued when people say their stool smells foul, doesn't it always? Overall I suspect something hormonal and your OBGYN may be as helpful as PCP so pick your favorite