I thought Pom was almost housebroken was I wrong?

They do this - just as you think you have it licked, back to square one. I look on this sort of thing as my fault always - missed the signs. Another thing, have you been carrying her outside? I realised my Whippet didn't have the faintest idea how she got to the backdoor because I was picking her up and carrying her out there lol. And I now take her out with a slip lead on, walking to the door and out. Unfortunately although she should be able to hold, they still, even at 7 months, have a short attention span, and simply forget, until they just have to go! Mine does the same thing (although she only 16 weeks yet) - she goes though the night dry, and has done for some weeks now, so I know she can hold it! Yet, unless I don't keep at the putting her out regularly thing, I know she'll pee inside.