OK, how about this, what if the way you affected the past prevented you from going back, like knowing you were going to be burned for being a witch because you showed up in a time bubble? Actually, in the end, you would have sill only lived one life, you just chose to live in a different time. In a sense, like in a couple of Ghost's and my explanation, times are more like positions, so it'd be like you moved to Japan.
By the by, how old are you and where are you from?