It's impossible to give advice without knowing the genders for sure. You really have to properly sex them asap. I've scooped rodents up into clear containers to get a better view.
If you're not able to do it, take photos and post here. If that's not an option, see if your vet can do it.
EDIT: Gestation is about 90 days. If s/he truly is pregnant and showing obvious signs, she's far along already.
If you're not able to do it, take photos and post here. If that's not an option, see if your vet can do it.
EDIT: Gestation is about 90 days. If s/he truly is pregnant and showing obvious signs, she's far along already.