
As said, there's nothing you can do at the moment, unless she starts having a nasty discharge. I always say scanning maybe ok to confirm or not, a pregnancy but even if puppies are seen at the time, there are no guarantees the bitch will carry to term. I'm afraid I had one who looked the expected size at around 5 weeks, but didn't get any bigger. In the end, she had one bitch puppy, by C.Section after x-ray at full term, showed she was there. Whether mum reabsorbed the others or not we/I don't know. My vet saw no sign that this had happened.
I've always seen movement from around 7 weeks with mine although they go quiet within 24 - 48 hours of birth. The first time this happened, not expecting that, I panicked.
If there are no puppies (or even 1 by C.Section!!) it's going to be very disappointing, but at least you should still have mum, which is always the most important thing, to me.