great plan, considering I wouldn't be born
If you went back in time and stopped yourself from being born, then you wouldn't exist, and therefore be unable to stop yourself from being born. However, this would mean that you would, indeed, be born, and therefore able to stop yourself from being born, which is what you do, but then you would again, no longer exist, and therefore be unable to stop yourself from being born. But this would, again, mean that you would be born, then go back and stop yourself from being born, and so on and so forth.