What could cause my front teeth to hurt all of a sudden?

Lots of things: Trauma, cavity, periodontal disease, sinusitis, & occlusal prematurities, just to name a few. Can't diagnose your exact cause or treatment needed over the internet, so that is why you need to make an appointment with a local denist.

Deep bite: Condition is susceptible to trauma during high level of stress and grinding habits. Teeth with large fillings/restoration are more at risk to hyperemia and cracking.