Oral severe burning

I have had severe tongue burning for a week now. dentist said thrush and gave me some logengers. in so much pain and upset stomach. don’t know if it’s because of my mouth or the logenzers. Has anyone else experienced this. Hard to eat because of the burning very anxious. Don’t think it’s thrush and if it is it is severe. seeing my PvP tomorrow.

it does sound like oral thrush