Have Red Dots On Tongue Why Do I Have A White Furry Tongue With Red Dots?

Why do I have a white furry tongue with red dots? - have red dots on tongue

I am 15 years old and recently I saw a stuffed white coating of the tongue (if that is the way to describe), together with small red dots. Can anyone tell me what causes it. My mouth is dry, sore tongue, sore throat or something, but when I see, I think, yuk!