Thanks guys. Went to the dentist this past week and it turns out I don't need a root canal at this point. He said I had pulpitis but it was likely reversible since it hadn't spread to the root according to X ray and physical examination.
The bad news: due to bulimia I had while wrestling in high school and college, it seems my teeth have been worn down prematurely and I'm going to need to have buildups and crowns if I don't want to have them all pulled and get dentures. I certainly can't afford to have them all extracted and dental implants. Ugh.