By mind chatter are you referring to internal dialogue? If so then yes. Everybody experiences this regardless of having MD. The mind is never silent. It's constantly processing everything around it. Many people have internal conversations going and it's perfectly normal. I imagine that when you have more going on in your mind the louder it is going to appear.
Yes I do get mind chatter, and I think it's normal because many people do it whether they admit or not. Sometimes when I'm trying to decide something, I have an internal dialogue with myself.