Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency care for severe pain, difficulty breathing, fainting, confusion, vomiting blood, black stools, or fever and chills with jaundice.
Seek prompt medical advice after treatment for new jaundice, dark urine, pale stools, persistent abdominal pain, fever, or repeated vomiting.
Follow-up depends on how the stone was treated and whether the gallbladder remains in place.
A clinician may repeat liver blood tests to confirm that bile flow has returned to normal.
Further imaging may be needed if symptoms continue or blood tests remain abnormal.
Missing this follow-up can allow the stent to become blocked or contribute to infection.
The article also says
People who receive a temporary bile duct stent need a clear plan for removal, exchange, or reassessment.
After ERCP or surgery, follow the care team's instructions about eating, activity, wound care, and medicines.
Mild throat irritation or temporary bloating can occur after an endoscopic procedure.
Symptoms that are worsening rather than improving should be reported.
Gallstones can occasionally recur in the bile ducts even after gallbladder removal.
New symptoms should therefore be assessed rather than assumed to be unrelated to the prior condition.
Every sign above is quoted from the sofidex article on Choledocholithiasis. If you are not sure, err upward — it is always reasonable to be checked.