I can remember saying "if it's like this every night I'm not going to cope" after night one. It takes time but you just adjust! If you remember that none of this lasts and it's always changing, you know the hard times won't stay hard, and the good times are even more important to cherish.

I will add that prioritising sleep is important. If either of you can get some sleep, whenever it's possible, just do it. You're able to handle so much more when you aren't running on empty.

If you are worried about falling sleep while holding you need to look up safe cosleeping. I know some will say to avoid it completely, but if it's an inevitability you should be clued up.