I'm up with DS, 3 weeks.
Made the mistake of waking DP up for help as am just so tired but that was a huuuuge mistake, he has no patience with the baby at all and gets angry with him. This only happens at night, which is when I need help the most.
Baby and I have now relocated to the living room and left the idiot to it, his need for sleep is obvs much greater than mine 