The only way to know for certain if you have an iron deficiency is to get tested for it. If you do have an iron deficiency, supplementing your diet with an iron vitamin can lead to benefit. I recommend contacting your doctor on whether this is a good idea or not and at what dose you take it.
My girlfriend has it and has noticed a steady improvement in her energy over the last few months. She has been anemic for years.
Cast iron skillets also can be a benefit to someone with iron deficiency because the iron is added to the foods you cook.