I think there’s a growth spurt and a leap around 6 weeks, so it could be those things coming into play and it will hopefully pass in a few days. My daughter was also very difficult to put down unless I was right with her so relied on the sling and going for walks to get her to sleep so I got a break from holding her and sometimes she would stay asleep after getting home.
Mine did the same thing at 6 weeks it's a growth spurt it lasted what felt like forever, but it was maybe less than a week. I even caved and tried a pacifier, which he didn't care for. He was growing and needed mommy 🥹
I literally could have wrote this. Very similar experience with my 6 week old last night 🙈 I'm gonna try her in my sling today if she's the same at least then I'll be able to get a few things done.