Suffering from fatigue

B-12 injections would give you an instant boot though.
Everyone is able to exercise, just start with short walks of 15 minutes and increase it by 5 min every week. Being out on the fresh air and walking will
do wonders for your fatigue and your mental well being.

Who won't do the test? You have pernicious anemia in your family, both parents and your sister, and your doctor won't do the test? Risk factors include family history; it is a known autoimmune disorder. See a second doctor if the doc won't do the test(s).

A certain set of CBC results is characteristic, as is a positive anti-intrinsic factor antibody test. The cbc is a routine test.

It may be that your m.d. has already done a cbc.

Wiki -
http://en.wikipedia.org/wiki/Pernicious_anemia

I am not sure of what a cbc is?

CBC = complete blood count
http://labtestsonline.org/understanding/analytes/cbc/tab/test

As region says, it's a complete blood count. His link has a good explanation.

I used to be a hematology tech, later worked for an expert in pernicious anemia and other autoimmune disorders for about a decade. This was a long time ago, but I got a little miffed that apparently your doctor wouldn't test for it in the circumstances you describe.

My doctor did do a cbc. Everything was in the normal range for the cbc. So does that mean that I don't need the pernicious test? Thanks.

Sounds like it. Other tests that I know of are for antibodies, and those vary even with people with known p. anemia and are probably expensive to boot. I assume they wouldn't be run for someone with a normal cbc.
Perhaps there is some new test that I don't know about, but far as I know the cbc is the go-to test.

There are other causes for lack of B12 than pernicious anemia. It can be a side effect of - I gather - many conditions and drugs. Or your B12 level (there are tests for that) may be fine and your tiredness may be a result of some other condition.

Talk with your m.d. some more.

Thanks for the info.