I would take her back to the veterinarian. It's still possible (even though she had her teeth cleaned 14 months ago that it's her tooth. Is she still eating? If so, watch her, she may be eating "gingerly" or being very careful. Let the vet know that the ointment given to you hasn't helped much since the eye is still swollen and ask him/her to please check your dog's teeth. They may need to do some dental x-rays, so be prepared for that. By the looks of her in your picture, the swelling looks like it is down in her cheek, too, which makes me think even more it's her tooth.
Trust your instincts! Good Luck!