I think you are a star to worry about this before acting on your first instinct. For a lot of people one dog is too many, some can live with many. Only you know the time, energy and space you have and if you can cope. I would say it would probably be better to get settled into the new house as any new dog already has a lot to cope with without adding moving house onto the list. It would be impossible for you to do everything as well!!!! Let us know what you decide, only you can make the right choice. I try to think that if I have any doubts at all after going through a problem then I haven't found the right solution. Good luck.