All the signs are there, but if she is only on day 47 she is only just under 7 weeks, so still a while to go. Not much you can do either way, but I would have thought if it was a phantom she would be 'nursing' phantom puppies by now - carrying toys off to her bed or even your socks. They tend to go straight into the 'nursing' mode rather than the looking pregnant bit - and it usually happens at about the time the pups would have been due rather than during the 9 weeks leading up to it.