Hi, I understand your concern. * In pregnancy heart is overworked due to raised blood volume, it works fast , at the same time,blood vessels are dilated , making blood pressure low. This results in less blood supply to brain,specially so with sudden change of posture. In your case it is further aggravated by weakness from less appetite & anemia. Please don t worry, this will be partially controlled as you get adjusted to pregnancy hormones, and partially by improved diet ( with medical assistance- vit. B complex/ folic acid supplements.)& correction of anemia ( by taking Iron,Vit, c, B complex, proteins containg food/ Iron tonic / mld exercises & healthy life style . * The pins & needles in hands are again due to blood circulation changes/ anemia & will be relieved by the same treatment as above & protection from exposure to cold. Thanks.