LO's should have a growth spurt around 6 weeks. Hallie's only lasted a day or so. I basically grabbed some water, snacks, and the remote and didn't get up all day. They can be exhausting but you'll make it through! It helped me to give Hallie to DH for a bit. Since he didn't have the 'goods' she was calmer with him.
I found that M gets calmer with DH sometimes too and I was wondering if it could be that he doesn't have the 'goods' lol. I really think that has something to do with it!