Do these sound like Gallstone symptoms?

Well, you've got the pain part right but it would specifically be with high fat meals and should also come with nausea and vomiting. Also with my attacks I did not have to take shallow breaths- breathing did not impact my episode. Still I'm glad you have an appointment. Everyone's different and it COULD be a gallstone issue- according to my research nearly everyone has gallstones to some extent. Your chances are greater if you fit the demographic of an overweight premenopausal female with a family history of the disease. I hope this helps. Let us know what the doctor says! :)