If the pain occurred suddenly after the crown preparation, the pain could be due to slight discomfort from anesthetic given, the bite being too high or possible fracture in the tooth. I would definitely have the tooth evaluated by your dentist.
You should be able to chew gum. To help with bad breath, use floss threaders to clean under the bridge after eating. Clean your tongue regularly as well. Hope that helps. If you are having any issues with your bridge, please seek out a dentist to follow up.
Sequence of dental treatment is to evaluate your bite (occlusion) to decide if braces or Invisalign is needed for an ideal bite. If there is an issue with your bite it could cause failure of veneers on the front teeth. Once braces is evaluated and treatment completed, would consider implants and then veneers. If your bite is ideal then implants and then crown. Once an implant is placed, it cannot be moved so it is important to evaluate the entire mouth before placement. Hope that helps. Definitely consult with your dentist who is more knowledgeable about your specific case.
Temporary crowns are not meant to be worn for long periods of time. They can fracture and not hold the space of the original tooth accurately creating a loss of arch space. Food may get lodged near temp crown over time creating cavities. Tooth structure under the crown may be questionable if received too much pressure. If the tooth is not root canal treated, tooth can become very sensitive or damage to the nerve can result. Not moving forward with crowns can lead to many unforeseen problems.
Without doing an exam, I would advise getting a consultation for orthodontics first. Aligning the teeth and then considering if you want to alter the teeth cosmetically will most likely offer the best result.
