According to current time travel theory, traveling backward through your own timeline is technically impossible.

This is not to say that you couldn't go back, but rather that the moment you travel back to a period in time, you are creating a new timeline independent of your own, in which a time traveler from the future arrives. This creates a parallel universe, and should you be able to return to your time and place of origin, you would find that nothing you did in the past changed the timeline you're in. You would have to travel forward in the alternate timeline to see the effects of your meddling, effectively abandoning our current timeline.