I talked with the vet today, and we've determined that this is non-urgent, but we would like to bring her in for a checkup soonest.

this is fantastic advice, thank you!

Hi guys. The cats are about 12 weeks old, and I got them from a shelter. I don't have a date that they last saw a vet, but their foster mom said that they haven't been for any serious sickness, just for vaccinations and to be spayed / neutered.