Unusual case: I've had a stutter for about the past three years, but over the course of the past year it's just gradually gone away?

Unusual case: I've had a stutter for about the past three years, but over the course of the past year it's just gradually gone away? I don't know whether this actually says anything about the nature of stuttering, but I figured it might be worth sharing anyway. I've had social anxiety for the past couple of years because of my fear of stuttering when I speak. These days I still have the same anxiety but I just don't really stutter anymore. I'll fuck up words every now and then but thats generally as far as it goes. Is this supposed to be normal, for a stutter to just arise, stick around for a couple of years, and then go away?