Multiple copies of yourself
When you go back in time you go to an alternate reality, a copy of your reality, not the reality you came from, but ths doesn't mean you wouldn't bump into a copy of yourself in this alternate reality.
Plate dimensions for time travel are infinitely more complex than a human brain; there’s no knowing potentially where you could end up. When the Stasis first tested them, a scientist was sent through a timeline, however on his return it wasn’t the same scientist, he looked the same but clearly he wasn't the same person, it was someone else with slightly different memories, character and personality. The realty he had come from was pretty much identical.
The modified time-link that the gateway uses is quite different and quite safe to use, because the link is kept open to prevent a traveller from entering alternate time/space variations. You are able to go back and forth travelling light years across the cosmos, you’d travel in the same way as you’d travel on a high speed train, the time however may vary a milli-second from one destination to another. Whatever the time is on Earth would be similar to a planet 1200 light years from Earth.
Two things to consider when travelling through dimensions.
(1) You could end up in the middle of an ocean where an ocean used to be, because things change their location over long periods of time.
(2) You could end up in a universe which isn't set for biological life.
A deja vu moment is when present time merge's with future time. We all know in physics the past, present and future coexist.
Everything that can happen will happen within infinite dimensions, and in this grand scheme of everything the past still exists in a 2D sate, so does the future, and although future information already exists before we experience it, it lies beyond the matrix. Information is never lost. If you go back in time to change something, you merely create the illusion of something else.
Going back in time will take you to that moment within the matrix, think of it like your audio recording track; which is a frozen state until you play the track. But by entering a timeline you actually change the dynamics unlike your audio track that cannot be changed, and in turn you entering this given timeline will have an influence on the future events.
The feeling of being 'you' will experience a different dimension 'time state' within the infinite computation; you could in fact re-live your entire life all over again but with a different set of outcomes.
Light warps around the universe creating the illusion of infinite space. Galaxies are hidden within our universe like a hall of mirrors, multiple copies within.