The ADA recently released a new tool on their website called "Symptom Checker". I checked it out and it seems like a pretty helpful tool in educating patients about what their various symptoms might be caused by. Now it cannot replace an actual diagnosis from a dentist, but it can give patients an idea of what may be going on. It is still highly encouraged to seek professional help to make sure you're receiving proper treatment.
Check it out here:
ADA Symptom Checker