Leap 1: 4-5 weeks old

K

So I've downloaded The Wonder Weeks app and it seems pretty accurate for what I'm currently going through with my 1 month old.

Anyone that remembers going through the first mental developmental leap, do you remember how long it took? After that, was your baby still really fussy and didn't like yo be put down? It's taking a toll on us but according to the app it's just a phase?