Hi, aljo. Hang in there, and keep going to your doctor or find another one. I had gall bladder problems for a year, before I finally had surgery (after multiple tests that were "normal"). I didn't have stones, but my GB was severely inflamed and covered in scar tissue, but because it was still somewhat functional my hidascans came back as ok, and ultrasound showed nothing either. Except for the swelling in your hands/feet, your symptoms sound like gall bladder.
You shouldn't have to suffer, and the docs need to get to the root of your problem.