Smoking increases vitamin requirements. Your own observation of symptoms. Medical history and physical exam by a doctor. Increased susceptibility to infection. If you take oral contraceptives, consider using another form of contraception.
Iron supplements to take orally.
Schedule regular rest periods until you are able to resume normal activity. Eat foods daily that are high in folic acid. The liver can store folic acid for a limited time only. If You have symptoms of anemia. Symptoms don't improve in 2 weeks, despite treatment.