If it happens again, try to take note of what you ate, if you had pain or any other symptoms and the location of pain/boating, etc.
Gallbladder issues will typically be upper right - put your fist at the lowest end of your sternum and slide it to the right. That's approximately where the gallbladder is. You can also have pain in the upper right shoulder area and between the shoulder blades. Nausea, pain & bloating are common signs that accompany gallbladder issues. Vomiting, fever and chills can also happen. It could be gall stones or sludge in the gall bladder. The stones could be in the gall bladder or blocking the duct.
Glad you're getting it checked out.
There's a chance the doctor may order an UGI in addition to the Ultrasound. (If they do & schedule both for the same day, make sure the ultrasound is done first.) It's pretty easy. It's done use fluoroscopy (x-ray video). The X-ray tech will give you barium to drink (white substance that has consistency similar to a thin shake, though it may be a little chalky-ish). (They may also give you a fizzy drink in a small dixie cup and tell you it might make you feel like you need to burp, but don't. It helps put gas in the stomach, which actually helps make the exam better) The radiologist will watch the barium as you swallow and will follow it down in to the stomach. After you've finished, they have you roll from side to side (coats the stomach & gives different views of stomach). He'll keep watching until the barium begins to leave the stomach and enters the small intestine.
