Saying "NO!" to me is scolding, but I didn't mean to sound like you were being "mean." I do, however, think a seven week old puppy being potty trained needs less of "NO!" and more of being taken out religiously and not getting any scolding, for she is far too young to control herself. It's just wasted effort if you're trying to make an impression, because until she can control her body, she will have more accidents, as is evidenced by the fact she woke up, immediately whimpered, then peed.
The point of my post wasn't to criticize, just to point out a possibility, however likely or unlikely, she might have urinated after being scolded.