I am 25 weeks pregnant. And whenever I go to market and stand for more than half an hour I faint. And feel light headed and my hands goes numb. That is scary. I was suffering from morning sickness till 21 weeks and now I have completely recovered from it. Due to which I started taking iron supplement late. I'm taking folic acid regularly from the time I found our I was pregnant. Calcium I'm taking every alternate days from week 23. N for iron recently I have started taking rb tone syrup. What could be the reason of my fainting? I have fainted for 2 times as of now. I'm very scared. Is it harmful for my baby. What preventive measures should I take?