I started to have pain on my left side, under rib cage. It started off just as pain and three months later I am now having symptoms of anemia. The doctor said I didn't have anemia but all the right numbers are leading to that. I think that I am b12 deficient but no one has tested me. I was so weak and felt like I was going to fall out that I went and had a b12 injection and I felt better then I had been. It got to the point where I couldn't walk up a flight of stairs without feeling out of breath. They said my spleen was not enlarged but I can feel it. Not physically but something. I guess I am wondering has anyone had issues with your spleen and b12 deficiency.