I probably would've kept slogging on that same chord change, because there's a tendency to have that happen. You get into the cadence in your mind, and it's hard to make the kind of left turn that you probably need to keep it really interesting.
The very desire to be certain,to be secure,is the beginning of bondage.It's only when the mind is not caught in the net of certainty,and is not seeking certainty, that it is in a state of discovery.