Suggest Treatment To Increase The Haemoglobin Levels In Body

hi this is me Rupa, 21 years lady. My question to u is how to increase blood in our body with in a week and what will be causes of low hemoglobin and what are the prevention of it. Since one week i am suffering from low hemoglobin and this is caused to me by my mensuration period and my hemoglobin level is only 6