impossible mode glitched death on both attempts

In my first attempt at impossible mode I opened a door somewhere in chapter 8.and glitched outside of the door and immediately died. I thought it sucked considering I spent numerous hours on that save file but thought doing it again wouldnt hurt. I caught up around chapter 7. in this second attempt when going down the large elevator in mining after being chased by the hunter. My character glitched under the elevator and blew up and died. Is it possible to somehow get progress back or do I need to start over again.