Help I'm Stuck!

Playing Alan Wake 1 and I'm stuck in Chapter 2, trying to get to Lover's Lookout. I'm at the part where the hunter is trying to open the door while I am supposed to hold off the Taken with flares. However, immediately before I used all my flares and batteries. I can't hold off the Taken with 0 batteries. And when the Checkpoint resets, it is right where the Hunter says "Grab the flares from the emergency supply box" which is empty. I can't run and dodge the Taken at all. And I can't seem to reset to an earlier Checkpoint so at least I don't waste all my flares and batteries earlier.

Anyone know what to do?