INH and Oral thrush

My PPD test was positive and chest X ray was normal so my physician put me on INH as a prophylaxis for 6 months. After around 2 1/2 months of treatment i nothiced white reticular pattern apperance on my cheeks, gingiva, floor of the mouth. So my physician said it is oral thrush and he prescribed me with Nystatin for 14 days but that didnt help. Then he prescribed me Diflucane 1 tab and ask me to report after 1 week, but no result. So again he prescribed me with Magic mouthwash that has nystatin and maalox combination. Its one week now with that but still no effect. I feel the white apperance has progressed in my mouth slightly than before. So I need help to know what can it be and How i can get rid of it. Also can I try to discontinue INH for a week to see if there is any change. Will that have any negative effect on my course of INH and its effect. Please advice me. Thank you.