She's been away from the litter for 2 weeks (or, if she's been away for longer, then you got her from an irresponsible breeder who failed to socialize her properly, which can lead to problems like this and others).
A puppy that you've had for 2 weeks is going to have accidents. EVERY time the pup wants to go out, you must take her out. Praise her heavily every time she eliminates in the yard.
When you clean up indoor spills, first take the puppy outside the minute she has an accident in the house (this will help her associate urination with outside). This means you have to watch her constantly so that you can act fast enough to form that association. Once you go to actually clean it up, use amonia to cut the smell - - when the puppy smells old urine she says "that's my bathroom."
Expect setbacks when you're training a puppy. And yes, new puppies often have to go 15 minutes after they go. Newborn babies wet their diapers all the time too. It's just part of being a puppy
