@simmon78 First, welcome back to Mayo Clinic Connect. It looks like it’s been a while since you’ve posted anything so I’m happy to see you here. I’m so sorry you’re experiencing all of these uncomfortable pains in your stomach area. They have to be weighing heavily on you mind. Do the pains come on after eating or at random times? You mentioned you have autoimmune diseases. Are those under control and are you on medications for these?

Honestly, my first thought is to definitely go see a physician about these recurrent pains and feeling of being swollen under your rib cage. There are several organs which are located within the abdomen area that is right underneath the rib cage. Any one of these could be problematic if disease is going undetected.
Your shoulders sound so painful as well. All of these symptoms would warrant a look-see. Just for your peace of mind it would be worth your making an appointment with a physician. I hope you do this soon. You’ve been suffering with the unknown long enough. Wishing you all the best, Lori.