ok, according to my calendar she is about 41 days pregnant, that is Way beyond the early stages, if she is pregnant for real and not having a fake pregnancy she is due about July 12th.
here's some Very good sites to read and learn..ask your vet to schedule another x ray for day 58 to determine if her pelvis is big enogh for the puppies to pass and how many puppies you are expecting before day 58 the babies are not calcified enogh to count them or see them clearly.
http://debbiejensen.com/
you also need to read here and get a whelping box and all necesities ready SOON... is a lot of information here,
HTH,
Carmen in nj