Sorry if I came across as hostile and I am in no way saying that I don't believe you are speaking the truth, just to clear that up. However you make a mistake, tachyons and time travel are a hypothesis while gravity is a theory, a huge difference.

A scientific theory is "a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment."Scientists create scientific theories from hypotheses that have been corroborated through the scientific method.

Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used synonymously, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research
Further more no evidence has really been found for tachyons or time travel nor have they ever been indirectly observed and they are not even comparable to the theory of gravity as they break multiple fundamental currently known rules.
I find it quite obvious that I want an explanation of your dimensional theories as you have posted it in the research section of the forum, if you don't want discussion maybe this would be better off in the beyond dreams section