any flaws in my logic?

I believe I see one:

either me or me will be in pain

If there is a clone of you out there (and actually, if we grant all of the theories here and assume infinite space, then I believe it logically follows that there would be an infinite number of clones) , it is still not you or you in pain. You are not your clone, by virtue of the fact that your consciousness is different from his. Even if he has the same genetic makeup, memories and ideas, you’d still be unique in that only you possess your consciousness. So if he gets hit by a car, it is he that is in pain, not you, even though he is your clone.