Pain could b due to occlusal imbalance so when u bite something u get pain, so probably crown correction will relieve ur pain or it could b due to recent RCT/ improper RCT. So better to visit ur dentist asap.
Sometimes RCT treated teeth may take7-10 days to b completely symptom free.
Next Steps
first subside ur discomfort by medicines and visit nearby dentist for finding the actual cause of ur pain.
x-ray if require/ removal of crown if needed
Health Tips
tab Dan-P twice daily
warm saline gargles
take soft diet