Help a mother out


So my little boy is nearly 5wks and for the passed 2wks when he sleeps at night he seems to make these noises as if he's dreaming and he only sleeps about 2hrs before needing fed again. How are you mums managing on the lack of sleep? Due to these noises I'm sleeping less as I keep thinking hes awake but hes not and then I have to express so this takes up 40mins of my sleeping time