Symptom checker

Hi, I have a whites tree frog that is currently showing the following symptoms:
Lethargy; low appetite accompanied by weight loss; blowing up air sac without calling and sometimes one side at a time; infrequent bubbles from nose; and I keep having to pull his aged skin out of his mouth as it seems to be getting stuck.

I have him in a hospital tank, humidity is above 75% with frequent misting, he has access to ad-lib feed to try to gain some weight which is dusted with calcium everyday at the moment.

I cannot get him to the vets until next week due to work, is there anything I can do at home to help his recovery until then or anyone have ideas what these symptoms point to, it’s such a mix of symptoms I’m not sure what’s going on.