I'm trying to avoid looking up a guide for this game, but here's the thing, I just got past that part where a bunch of guys show up overhead, though I ran from oncoming fire and went back to find they were all gone, went into the next room healed myself for the first time, crouched under the table, went to the door on the other side and it won't open. I went back to the beginning of the game and then back to the door several times now, I tried stacking some stuff to see if I could jump out of the trench, and I tried dragging a bucket to the door and tossing it at it. what do I do?

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theres a red light on the wall just before the door on the right side if that helps identify which door I'm talking about