The concept of time travel and its implications are still largely speculative and debated among scientists and physicists. there is currently no scientific evidence or widely accepted theory that supports the existence of traversable wormholes or the possibility of traveling back in time through them.
Wormholes are hypothetical structures that arise from the equations of general relativity, a theory of gravity proposed by Albert Einstein. They are essentially shortcuts through spacetime that could potentially connect distant regions or even different universes. However, the stability and traversability of wormholes remain theoretical challenges. To create a traversable wormhole that could be used for time travel, one would require exotic matter with negative energy density, which has not been observed or confirmed to exist.
Even if we assume the existence of a stable and traversable wormhole, the question of meeting oneself in the past raises several paradoxes, most notably the grandfather paradox. The grandfather paradox suggests that if you were to go back in time and prevent your own birth by, for example, killing your grandfather, a paradox would occur. This paradox creates a contradiction because if you were never born, then you wouldn't have been able to travel back in time to kill your grandfather in the first place.
These paradoxes and inconsistencies are some of the reasons why time travel, particularly to the past, is considered highly speculative and currently falls within the realm of science fiction. Our current understanding of physics does not provide a clear framework for such scenarios. However, it's important to note that scientific knowledge and theories can evolve over time, and future discoveries may shed new light on the subject.