at -1 to -9 you are not awake ... you try to stabilize... but you can not try the heal check.... other in your party can try to do the dc 15 heal check ..... so if there is no healers ,,, and 2 rogues gets to you first each round they each can attemp to do it since heal skill can be used untrained and it a wisdom based skill... also if a cleric uses a cure minor wound for 1 htpt will stabilze as well....