If your iron stores are good, taking iron can be counterproductive. Are you taking folic acid or any other supplements? I find high doses of folic acid do more than iron can for pregnant thal minors. 2-5 mg daily. Natural vitamin E and a good B Complex are also recommended. Be aware than some thal minors do require transfusions during pregnancy. I would suggest trying a high dose of folic acid before your Hb gets any lower. Once it approaches 7, transfusion will be recommended.