in the mouth. Usually they can be seen on the tongue, inside the cheeks, under the tongue, and in the back of the throat. I suggest you to get an examination done from your doctor and get a KOH examination of the scrapings done of these white coatings.
Nystatin (Mycostatin) liquid is used by swishing a bit in your mouth several times a day and then swallowing the medicine. Throat lozenges called Mycelex trouches can also be used. If the symptoms are severe then oral antifungals may be needed and other possibilities ruled out.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.