I was sleeved on 4/24 and the exact same thing happen to me yesterday. I thought I was doing good so I decided to cook dinner for my family and while I was cooking I accidentally took a gulp of my protein shake and instantly felt a pain in my left shoulder. I sat down because I thought I was dumping, I had the sweats, craps, and etc. so after 45min it gradually pass so I thought. 10min later the pain in my shoulder came back So i layed down and took like a hour nap it was still there when i woke up i thought it was gas so I got up to walk it out and passed out. I probably should of went to the ER but I didn't, today I feel better but I know I have not been getting my fluids or protein in.