Is it possible for me to scrape the white stuff off my tongue?

Usually, yes: Usually i see a harmless coating consisting of dead bacteria, dead cells from the tongue, all combined with a mucous and saliva mixture that coats the tongue. Use the cupped side of a spoon or a tongue scraper to clean the surface of the tongue. See your dentist to rule out a more serious condition like thrush, which is a yeast infection of the tongue.