Your doctor should have run an iron panel that includes your ferritin level (FE). Most of us track the FE and it's good to have a baseline established in the event your anemia progresses to the point of needing transfusions. Each transfusion adds about 250 MG of iron to your body and FE is a good indicator of how much iron you are accumulating.
Spend some time reading about MTHFR mutations as it relates to B12 and Folate. This site has lots of info...beware though...it informative and confusing at the same time. It's a complex issue and can get very complicated.
http://mthfr.net
B12, folate, b6, copper, d3/K2, iron and zinc are key nutrients for blood production and immunity. Of course everything plays a role but these are key.