Post Covid toothache pain for 7+ Days.

It has been 31 days since he was tested positive. He was admitted to the hospital on day one, right when He got Covid positive results. The hospital He was in had little to no hygiene because everyone shared a single humidifier. I'm worried that because he had to use humidifier in that hospital (That single humidifier which was shared among all Covid patients) he might get "Black", "White" or "Yellow" fungus. He was also given 3 dozes of 8mg Dexamethasone on day one before he was discharged from the hospital 2 days later since his O2 level never dropped below 97-98 and never had fever while he was admitted. This teeth pain started 6-7 days ago and because of it i've been giving him Augmentin 625mg which relieve some pain but it doesn't make it disappear completely. Today night his eyes were started to hurt as well, I'm extremely anxious about his health, he has no diabetes or any issue related to Immunodeficiency. He never got fever for about a month but I'm still extremely worried.