I didn't get which version of 'you exist multiple times' you use.

• multiple people that look rather similar to you
• multiple people that share your experiences for a certain period of time (comparable to branching)
• multiple people that would be difficult for an outsider to distinguish, but still have major notable differences (differing inside experiences)
• multiple people that share your exact sensory experience up until now completely - which basically implies a decent copy of the whole earth, and some of the surrounding space to make it really really similar
• atomic/quantum identical copy - which needs both a copy of the earth, and then some, but also a high level of similar quantum events.

Each of these seems less often to exist in a finite universe. In an infinite they might all just hang around. But the later seems really really unlikely to ever happen.