Hello, It is not uncommon to need a bite adjustment after a restoration such as onlay, crown or filling. Usually the new restoration is causing an interference. This often occurs on a movement from side to side called excursive movement. Please make sure this is checked and adjusted. From your description, this may involve other teeth than the tooth recently restored and still require further adjustment. Currently, you should stick to a soft diet. Give your mouth a chance to adjust. Take some Tylenol or Motrin, if necessary. Long dental procedures with local anesthesia can cause stress on the jaw. Do you grind your teeth? If so, do you wear a nightguard? You could consider purchasing a soft nightguard to reduce pressure on your teeth.. These are available we are dental supplies are sold such as your pharmacy. This may offer you some temporary relief. If your discomfort does not begin to decrease with time, please consider having another clinical exam with a second opinion. This will determine if the restoration was done properly. If you have no contact with the tooth and your bite continues to feel off, the onlay may need to be redone. Do you have any other dental treatment planned that may affect your bite? This may be a factor concerning the current restoration as well. Thank you very much for your inquiry. I hope my suggestions are helpful and that you feel better soon.