Went to Endodontist for pain in a crowned root canaled tooth. Still have pain and feeling concerned?

said I have an abcess because prior dentist left temp filling in and did not remove when putting regular filling in. dr. cleaned it all out 2 days ago but still in pain. said it's normal and continue antibiotics and advil. I never had such a chronic pain after seeing an endotontist. usually I'm fine right away. concerned