So your instincts were right, she was beginning the labor works.She's walking around tonight and making loads of nosies could this be it ?x
It is not easy to tell as forumists, they do often have some precontractions. But here we do have the answer!
How much do they weigh??
Congrats and good luck!
To your question if there may be more: If her tummy feels empty, she should be done.
If you feel something, it may be one more OR just some swellings.
The trick is to observe: if she is contend, calm, seemingly no problems, you can await, but keeping watch.
If she is in distress of any sort, you contact your vet, and are ready to rush in if necessary.
Good luck!