I myself just posted something pretty similiar. The itchy skin could also be a fatty liver. When I had gallstones I had an extended belly. I looked like I was 5 months pregnant. I had right shoulder pain and had major gas. Are you in a huge amount of pain? I had my gall bladder removed. If you are in major pain don't wait for the results from the doctor. Go to the ER if you have to. Especially if you start getting a fever. I am not trying to scare you but this is something that you don't want to mess with. I hope I helped.
They have not told me to do anything for the gallstones they have done blood work a few times now and everything has come back normal. For the pain in my neck they did blood work and sent me for an ultrasound to see if it is thyroid problems I have to wait and see what the results are for that.
What course of action has your doctor recommended for the gallstones? Have you had any bloodwork done including a CBC and Liver Function Test. The itching can be caused by eleveted bilirubin level which can be caused by gallstones. As for the pain in back and front of your neck I am not sure. I do know that gallbladder issues can cause shoulder blade pain.