well... i wouldnt expect less :P think, exactly what scared you, was it the fire? her words? or her existence?
hospitals are tied with pain... whether it is from injury or death. white is a symbol of purity. yet your in a hospital. so it makes sense, why your mind would tie the two. fire, assuming you mean great big fire, bond fire, or out of control, means distruction. if your mind told you death, it means death is an important factor. (im basimg this off of most people in the western culture which im assuming you are. do any of these have a possible double meaning?)