Low iron????

So I’ve been told while pregnant that I have low iron, but never was told how low, I don’t even think I had a blood transfusion when I went I to labor, not sure if you need one when having low iron. I started working and when I get home I have like NO energy to to do anything, I am just SO tired. Before working I take naps through out the day with my son who will be 3 months on the 28th, but I recently started working and I get home exhausted, even tho I’m just sitting at work I am dead tired. No energy for anything at all, I try to take naps when I get home with my baby and of course he doesn’t want to just lay there all day but I lack the energy. Do any of you mom take any pills or take anything to give you that extra boost of energy?