Tis the season… to get your teeth checked
Around this time of year dental schools need "models" for their board exams. Even if you don't get selected, you'll get a qualified person to look into your mouth for free and at least tell you whether you should freak out or not. Treatment at these places tends to be much cheaper and they'll do a good job, the only catch is that it tends to take a long time. Here is an ad for San Francisco, but check Craigslist or call whatever school you've got in your city directly. I think for DC it's Howard, for SF - UOP and UCSF.