After I got my acne facial. My dermatologist offered me to use Tretinoin gel to remove my pimple marks. At first, it made my forehead and chin glossy, since those are the parts where my pimple marks is... One night, I accidentally put much amount of tretinoin on my cheeks that caused to redness, dryness, itchyness and irrated. How many weeks will I have to wait for this to heal? Or what are the effective remedies I can do?