From little digging round I have come up with the following, which I hope will answer your question.
A myelocyte is a young cell of the granulocytic series, occurring normally in bone marrow, but not in circulating blood, they are usually confined to the marrow at approximately 10% of the nucleated cells..... in pathologic states, myelocytes are seen in blood- Neutrophil precursors (e.g., promyelocytes, myelocytes, and metamyelocytes) at more than 10% of white blood cells (in marrow) should be investigated.
In CML at diagnosis there can be spleen enlargement, anaemia, markedly elevated levels of leukocytes, thrombocytosis, eosinophilia, basophilia, and a predominance of myelocytes in the peripheral blood.
Neutrophilic myelocytes are commonly seen in acute infections and in conditions affecting the environment of the bone marrow.
So I agree with Lucas that you should not stress about this low level in your test result. It shows virtually no presence of myelocytes in your peripheral blood and the difference between 0.03 nd 0.0l is so small it is not worth even considering.
I hope you can find some relief from your headaches and cramps which my well be a TKI side effect issue rather than symptoms of something else like an infection such as flu etc.
I don't think you need worry as this will not affect your q-PCR result.
I have sent you an email with Lucs cc'd s requested.
ref:
http://www.cap.org/apps/docs/proficiency_testing/2012_hematology_glossar...
http://www.patient.co.uk/doctor/peripheral-blood-film