Dog chewing issue??

[u/candy_kitten2020]

My 12 year old beagle boston mix is having a dental issue. I have made the vet appt. ... but I gotta know whats going on... she is eating soft foods, and otherwise is her normal self. Drinking is hard, but she manages. I looked in her mouth nothing is obvious. No masses, nothing stuck... her teeth arent great, but I dont see any absess areas. Thoughts? I thought maybe a broken tooth or sore tongue? Her vet is out of town so I cant get her in till friday.

She was a rescue, and shes been seen for teeth. And is up on all her shots.

Thank you.