I would suggest you ask them to also check your B12, B6, folate, zinc and copper to rule out any other major nutritional deficiency that can effect blood production. If you are low on iron, there's a good possibility you may have other nutritional imbalances.

Believe it or not, they don't always check for the simple things first.

A low hematocrit is not unusual when you have a low hemoglobin/red cell count. The hematocrit is a calculated measure of the volume of red cells vs plasma in your blood sample. So if your low on red cells, your hematocrit will be off also. Also, dehydration or even over hydration can effect that reading.

When monitoring your blood counts, it's good keep track and watch for trends versus just a single reading. White cells can and will fluctuate quite a bit since they have a shorter life span.