Self-diagnosis attempt #3214213423

I was told 2 years ago I could stop taking b12 injections. (I was taking them because people who had gastric bypass can no longer absorb b-12 properly.

I just found this little gem:
http://www.pharmacy-and-drugs.com/Blood_disorder/Pernicious_anemia.html

Pernicious anemia is a type of autoimmune anemia that is caused by the body’s inability to absorb vitamin B 12. The body produces antibodies that attack the intrinsic factor and the parietal cells. Parietal cells are found in the stomach lining. They produce intrinsic factor, which is a glycoprotein that enables the small intestine to process vitamin B 12. This anemia is the most common blood disorder. 

Symptoms of pernicious anemia are due to the lack of B 12 and include sore tongue, mouth ulcers, mental fogginess, fatigue, joint pain and tinnitus.