Clarification on the rules of Top Trumps when two or more cards win
As it's written, drawing a hand confers no advantage to the people who played the top cards. It's not that the same hand continues, it's just that there's now a bonus stack of cards available for the winner of the next hand.

In this way, if your last card was put into the middle like this then you're simply out of the game. You didn't win the hand, and you have no way to win the next hand to claim the bonus.

Now for the extra bit that the rules don't cover: if you were the player choosing the category and this happened, I'd have the next player either become someone else at random, someone who's obviously doing the worst, or just have you pick the category but not play a card.