Health Issues on Alone in the Dark!

Hey peeps. I have just started 8.2 on Alone in the dark. However my health is 1 hit from death and I have 5 zombies running at me, and I have no health packs or Explosives for fire bullets! can I go back to a previous chapter, heal up and go back to where I was with the items carried over? help!!!!!!!!!!!

SOMEBODY HELP ME!!!!!!!!!!!

It was 7.2 I was stuck on, but its ok I have done it now. Wow I can't believe nobody offered to help me out, shame on you people. Anyway it was the sequence entitled "the subway station" , and I will tell you how I did it or this thread will have been for nothing. If you run up on to the platform, past the big zombie with the big tongue that is coming out of the ground, there should be a door in front of you. When you get through the door, you will notice it's very dark and there is a spider on the wall. Ignore the spider and turn right, where there will be another door. If you are out of batteries, just run up and down that wall till you get the icon to go through the door. Then you should see an air vent collaps.Grab all you can from the shelves infront of you, and jump up through the vent. you are now in a safe place and the zombies can't reach you. shoot them from up here, or go further down the vent where you will find a pipe to break the vent panel, and drop down into another room with health spray, bandages, ammo etc. Once you clear the area the woman will open the train doors. Hope this helps. :)