I have had my puppy for a little over a month she is now three months. When I first got her I took her outside after every time she woke up from a nap and 15 min after she takes a drink plus whenever she was sniffing around. She did really well with it up until this week. Now all of a sudden I will take her outside and walk around and she won't go but when I bring her back in she will go on the floor right by the door. What am I doing wrong? * P.S I also live somewhere where it gets fairly cold and when I was first potty training her it was warm out. Could that be why?