2 weeks on the diet will barely put a dent in the candida population; are you taking any antifungals and probiotics? You need to address the environment internally before you can defeat it externally.
My tongue is pretty pink despite being a smoker and my oral thrush flairs up when I drink coffee with cream (about once a month). So I’d say I am one person has improved it. I think my tongue should be red though and not light pink.
I’d try out taking some black walnut extract and swishing it around your mouth some. I’d then try some oil pulling.