I think it’s far more likely that no part of me physically exists at all.
Explanation time!
For the universe to exist, it takes energy. A lot of energy. Infinite energy, in fact.
However, for a computer simulation of a mind to exist, it only takes finite energy.
It would seem to me that the chances of finite energy being used to run a simulation of a mind are far more likely than infinite energy being used for the universe to exist.
This, of course, would bring in the big old “what’s outside of that?” issue. I’m a big fan of that one. And while the likelihood of actually being in the real universe is small, I’m probably at the top level.