I think you stopped at d3_c17_08, put that into the game console, if your console is not activated, go into "Options", then "Keyboard", then "Advanced settings" and activate the developer console or something like that, then press ' or the key that the console is binded, and put "map d3_c17_08" in it, you should reload at the map you stopped.
Don't worry! If you press "new game" you can choose what chapter you want to start from. So just start again from the chapter you last finished in.
I think you stopped at d3_c17_08, put that into the game console, if your console is not activated, go into "Options", then "Keyboard", then "Advanced settings" and activate the developer console or something like that, then press ' or the key that the console is binded, and put "map d3_c17_08" in it, you should reload at the map you stopped.
ya he's just gotta load into the last map he was in