I have am carrying the device that calls in air support, and am on the side of a hill overlooking a big enemy camp with towers etc. On the hillside I have found some buildings in which a lot of first aid kits are. Then 2 machine gun nests from another hillside opens fire and I killed 150 of them but they just keep coming and when I try to leave (no direction arrows) I blow up or it tells me I killed Cooper, so I am trapped. What to do??