I can relate. In a 5-month period last year, I had a baby, sold my house, left my job of 5 years, moved 1200 miles, bought a new house, started a new job (same organization but totally different role), and went back to full time work (I'd been working part time since having my first kid 2 years before). It was A LOT, and I was constantly stressed and overwhelmed and felt like I was failing at everything.
But things slowed down and I settled in, and they will for you too (maybe not for a while, since..baby), and you'll adapt to your new normal.
When I started my previous job, my old boss said it would take 6 months to a year to really settle in, and I found that to be case. I settled in a little more quickly at my current job, but partly because it was still within the same organization. But unless there are major red flags, I think it's too soon to really know if your new job is a good fit.