My blood counts have been all over the place. When I feel better, the reds and whites improve. A month ago and the previous 6-8 months, white blood counts were lowest they have been. Low neutrophils also. Low was 2.3 but stayed at 2.5 much of the time. Now back to low side of normal, as are red blood cells.
It doesn't seem to be related to antibiotics, in my case. But they definitely go up in times of feeling a bit better. Whites have been worse than reds. Have had two bone marrow biopsies and five blood smears since 2012. All normal.
And I haven't a clue, just like everything else
. It no longer worries me, though.