Definitely yes, RCT must be done as soon as possible in this molar. As per your age, its always better to get even minor cavities repaired so that they do not progress into deep infections as happened in this tooth.
2-3 sittings of treatment, and you will be fine!!
Next Steps
RCT is recommended.
Health Tips
Avoid eating any hard food from the affected tooth till the treatment is done.
Do warm saline rinses twice or thrice a day to get some relief.
Do not depend on medicines for temporary relief.
Visit dental setup immediately.