White covering on tongue still there after 8 weeks is that something i should worry about?

Possible Candidiasis: Have you taken antibiotics recently? Even if not, it could be a fungal infection usually associated with long-term or heavy dosage antibiotics but can also be caused by stress or other illness. Candidiasis is also known as thrush and is generally easy to treat with a rinse or sometimes pills. It is caused by a fungus that lives in our mouth and intestinal tract & aids in digestion.