It sounds like a fungal infection known as Oral Candidiasis, but I cannot be sure unless I see it. It is better to get it checked out as soon as you can. If it is not Candidiasis, it can be a type of oral white lesion also.
Next Steps
Consult your dentist
Health Tips
Get it checked out as soon as you can, as an early diagnosis will help in managing the porblem more easily. In the meantime take the Capsule Densomin once daily, after food, at least for the next 15 days. Do not delay.