“The first 2 weeks are the hardest”... “The first months are the hardest”... what was your experience?

The pediatrician told me the first 2 weeks at home are the hardest. When I talked with some friends, they said they thought when the babies were 2-4 months that was the hardest.. another friend group said they thought teething time was the hardest.

I know there’s never an easy period with babies and everybody’s babies are different but I’m just curious:

**What has been your experience so far and why?