Sir
Root canal treatment can be done in a single sitting but it's not generalised that it can be done in each and every patient,,,it depends upon the condition of the tooth,extent of pathology and other things ,, your endodontist is the best person to decide.
Next Steps
visit a nearby endodontist for the needful
regards
Health Tips
avoid eating from the affected side and don't delay the treatment as it will lead to further detioration and you will need more time to complete the treatment