Usually if it's just gallstones, there won't be any symptoms and you can only find them on an ultrasound or X-ray. But if one of the stones gets caught in the duct, you will start to experience pain, nausea, and may get a fever. You can read more about it in medical terms at https://pocketdrugguide.com/gallstones/choledocholithiasis.html, there is quite a lot of information about diseases.