@mikkimcc, I'm wondering how you are doing? Are you still getting the swelling everytime you eat? I understand how the expense of dental work can prevent access to treatment, however, if you suspect the tooth is causing this, I think you should get it looked at. You might need an antibiotic for infection. And maybe can work out a deal for a possible temporary covering to protect the area until a more permanent fix is possible.

Another possibility is to contact the doctor who ordeded the ultrasound and report what you are experiencing when you eat. Is this a possibility for you?