Going back 30 some yrs off and on I was told I was anemic. For the last 2 yrs I showed I was low on b12 and got monthly injections. I feel no better. I feel so run down all the time and exhausted. I just read where abdominal pain is one sign of deficient in b12 which I have had terrible lately. Also I have gastroparesis which stomach doesn't empty properly. I also see where nexium also causes b12 deficiency. What the heck are we to do? Anyone have any ideas about b12 ? I think I am going to also take sublingual b12 pills even though the dr said no. what could it hurt?