How does this key piece of information effect your character?
My key concern with time travel is that in order for it to "work" in a timeline sense, the time traveller can't impart significant knowledge or change significant events because it would then leave them not in a place to do the same in the future so they never would have gone back in time to change the past and boom, paradox.
Now if you are going to use TT, instead of sending yourself back, the better route would be to have someone else sent back. This way it can be postulated that you might not have been involved at all at the time of being sent back, avoiding the paradox complication a bit, but not completely.
Is there any other plot device that you could use instead of Time Travel, it just seems, to me, to be too big of a crutch and easily abused/overused as it is.