house breaking a 4 month old puppy

Question
I am having a problem training my dog, I have had her for 2 months. I am not sure how old she is but I am guessing about 4 to 5 months old. When I got her she did pretty good at going outside. Now she is starting to pee and poop inside,she is doing this after she come in from being taken out. I usally stay with her until I see her go, then bring her in and then within a half hour she goes in the house. How do I retrain her to go outside I have tried everything.

Answer
The best way of housebreaking a dog is by using a crate-it isn't cruel and is the fastest way of getting a dog house trained,it usually works because most dogs

What you do is to put the puppy in there all of the time,except to take her outside,to play with her to feed her ect and keep her in there for about three weeks,and slowly let her out more,and if she makes another accident back in the crate she goes full time for another 2 weeks

now if that doesn't work using puppy pads or newspapers is another alternative,what you do is keep her confined to one room or in a pen and put puppy pads/papers down and slowly move them closer to the door and that usually moves the dog outside