Hey. But can you use pads and tampons with that Sim? They need to find a nearby toilet to use pads and tampons, perhaps that's a problem. You can change that behavior in settings so a toilet is not needed. You could test if that makes a difference.
I'm not sure what are you calling "PMS moodlets for pregnancy". PMS occurs right before Sim period starts but that's not a rule, sometimes they might not experience anything.