Help!!!!!! I'M HAVEING NIGHTMARES!!!!!?

ok i been having this reacorring dream that i was jumping on the trampoiling and then this bunch of boys(about 20 it seems like) get one the push me down and start jumping on top of me. the in the next part of my dream i am not in my body but staring at me and the doctors tell ing some one i don't know who that i'm in a coma and have a 99.9% cance that i would die. the dreams seem so real and when i wake up i find myslef in a could sweat. it started when i was 9 and the were a bout a month apart and now they ae almost every night. i cant stand it any more. am i going insane.