Is there a way to increase the intake of iron in my diet?

Yes. My militant vegetarian friends won't like me saying this, but by far the most available and best source of iron in your diet is meat, especially red meat. Foods that anti-meat-eaters claim are "great sources of iron" (peanut butter, raisins, molasses, tofu) actually aren't, and iron in spinach can't be absorbed except by Popeye.