The question is absurd without more info. Is the game limit or no limit? What does yours and your opponents chip stack look like? You are definitely behind right now, you might be drawing dead, and even if you're not drawing dead, you are an underdog to make anything by the river. What are you thinking???? Throw it away unless you are already pot committed. But how do I know if you're pot committed without the answers to the questions above?
flop come king diamonds, jack of diamonds and jack of spades. you and 2 others see the flop. i bet the pot, 2nd player folds, 3rd player pushes all in.
where do i go from there?