A few things:

1. Are you really sure of the day of mating? If not, your counting may be off.

2. If you are, you can wait until 70 days or if it were me, send to the vet asap for a check up.

3. Do not allow her to roam the house - keep her secluded in one room and make sure everything is ready - birthing box, litter tray, etc. is in one location. And yes, your stress could be making her stressed!

__________________