What you're saying doesn't make much sense but it sounds like you're very trying to describe the Novikov self-consistency principle. To be clear, this is a conjecture with no scientific basis. Time travel to the past is theoretically not impossible in certain spacetime geometries but that doesn't mean it actually is possible, and even if it is, we certainly don't know how to do it, so we have no way of saying how something that might not even be possible might potentially work if it were possible.