No! Well, not really. Not exactly.
It’s true that, like M.T., I was undocumented as a teenager. Some other details fit, too. But M.T. is a teenager now (you know… as far as fictional characters are anything “now”) and I was a teenager… not now. I took the kernel of the experiences – the emotions, fears, secrets – and put them into a completely fictional character in a thoroughly fictional world having a totally fictional experience.