Hi,
   Thanks for your query on HCM platform.
    I understand your concern.
     It's but natural to have low general condition along with low iron & 
fatigue after 3 pregnancies, child births & breast feedings. .specially. when it is followed by fourth 
pregnancy. 
Morning sickness adds to it. 
  1.   A regular pregnancy check up by a gynecologist/ get advised investigations done &  take the medicines prescribedc  regularly.
  2. Healthy life style consisting of-
      - frequent , small servings of nutritious food with adequet 
proteins ( milk), fresh fruits, veges, salads, sprouts,.fibers .along with  plenty of water 
      - Regular exercises ( Yoga/ walking ) 
      - minimum 8 hours sound sleep,
      - positive attitude . 
   Are the ways to combat fatigue/ have ahealthy pregnancy.
  - Hiding pregnancy does not seem to be practicle or beneficial . So no need of hiding the new arrival in your family, that you have accepted willingly/ happily.
   thanks.