Will naproxen help with toothache, if not what's best?

Your pain is severe and your response to it is completely understandable. The pain is most likely being caused by the infection in the abscess being trapped and pressing against a nerve, along with a possible nerve being exposed by the broken tooth. If I were you I'd go to an immediate care center and get an antibiotic for the infection. They may or may not give you some pain meds, but the antibiotic will help with the pain after a couple days. In the meantime you can go to the drugstore and get some dental wax-usually used for people who wear braces. It's very important that you first swish your tooth clean with some warm salt water. You have to get any trapped food out of the hole. Break off a small piece of the dental wax, rule it into a ball, and press it into the hole in your tooth. This will help block air, food and fluids from entering and possibly hitting an exposed nerve. Plus help keep any jagged edges from snagging your tongue or the side of your mouth. Hopefully these measures will help with the pain until you can get to your dentist.