You only have mild deficiency, have you tried adjusting your diet and finding out cause of mild anaemia? That would have more long term impact. As for iron, it is essential that you adjust dose and iron preparation( remember that there are many type of iron preparation) as per requirement.
Next Steps
Provide more history to diagnose root cause. till then focus on improving diet with green leafy vegetables, fruits like grapes, orange, lemon etc and whole cereals,
Health Tips
Better to take iron by prescription according to requirement only.