The vet seems to think it's normal and attributed it to her small size. She's still only 1.64 kg (3.6lbs) and has been for at least 6 months. I think her increasing tearing is from the teeth.
She also had some ear inflammation/ear infection. The vet gave us an ear ointment to use once a day to help clear it up. I hadn't even noticed anything so I think it was caught very early. It's nice that we have a vet who does monthly check ins for no fee. We go in for the heart worm treatment and the vet looks are her ears and teeth and they watch her body weight. In the end we just paid for the heart worm preventative and the ointment, no visit fee.