Thanks for your health query.
Since you are G6 PD deficient, your hemoglobin
values will always be on the lower side.
Please take the supplements as advised by your doctor, since you are not at risk of iron overload as long as you stick to prescribed dosage, since extra demands for iron are made during pregnancy
If you do not take the supplements, you will continue to have deteriorating hemoglobin and face complications of severe anemia
Also, do not worry about the baby, because the fetus manages to extract nutrition from the mother's circulation as long as you are reasonably healthy.
Do not allow the hemoglobin levels to fall further, by taking adequate treatment as you have been advised.
Please get adequate genetic testing
as the disease is heritable.
Avoid specific hemolytic drugs, infections, fava beans etc.