I think everyone has times in life that are really really hard. I think this would be hard if I was just nursing a little one all night and didn't have all of the other factors, but I do. I tend to have this feeling that I should be grateful and happy all of the time because my remaining children are alive. So when I start to feel unhappy or worn out by other factors in life, things that I think wear most parents down, I really beat myself up. Another bereaved parent explained it well - it feels like we are supposed to be crying tears of joy over every poopy diaper - and in theory, I kind of am.
But this is hard and frankly, I am having a hard time. I see the horizon up ahead - I just can't get there quick enough.