5days old and cant poop

Mexiflower • Hi im Christine. and we are trying for our last baby:) i have a girl12 boy10 girl5 boy4 girl1

Advice welcome. My 5day old. Has a very fill hard belly and has tried to go since yesterday but can't. I lost alot of blood and have been on iron pills and a high iron protein diet. What can I do to help her?