First time puppy owner – potty training

Hi All,

Wanted to seek some advice since I just got my first puppy.

He is 8 weeks old, and I've had him for a week. We've been focusing on potty training from day 1 with treats and positive reinforcement when he does it right. After 2 days of pooping and peeing in the correct spot (even whimpering when he had to pee or poop so I can open the door for him), he completely regressed to peeing and pooping everywhere but the trained spot.

Is this normal and I was just living the dream for 2 days? Thanks in advance!