Will oral thrush go away on its own?

My tongue has a white coating on it that doesn’t go away when I brush it or use my tongue cleaner on it. I googled oral thrush to read the causes and it says prednisone is a cause. I’ve been taking a steroid (I’m don’t taking it now, it was a six day prescription) with the name prednisone in it so I’m pretty convinced I have oral thrush due to the medication. I will call my doctor later and I have an appointment with him in two weeks, I am just wondering if anyone here has had it and how they got it to go away. Thanks in advance.