I have a small raised white bump on the middle of my tongue. This could be a thrush-type of fungal growth since I was on 3 separate doses of antibiotics in the past 3 months. (Had an infected root canal tooth for an extended period that had to be extracted) I have been doing natural anti-fungal rinses and have access to an old bottle of Chlorhexidine oral rinse which may be expired. The rest of the tongue is improving but the white bump is still remaining. (about 7-10 days) Never smoked, never chewed tobacco. Any advice would be appreciated.
How long can these things last and at what point should I have a dentist or physician take a look?

Thanks, Doug