hard to poop

its happening for me nw frm week 19. i was in tears and I could not walk and it is very very painful. so after 2 weeks I went to my gynae and she asked me to eat banana and papaya. she also gave me a stool softerner but not to be taken everyday unless its hard to pass through. its important to drink atleast 2 l of water and have fruits 3 times a day. I eat fruits after lunch and dinner. I am also drinking this milk enfagrow for mommy and it has helped.