Horrible Smell....

There is this absolutely horrible smell coming in through the vents in my apartment. It started half an hour ago when the fan turned on. Kinda smells like burning plastic. Which makes no sense as there was no horrible smell earlier when the fan was on. I have gone all over my apartment and even upstairs to make sure that nothing was actually on fire. There must be something in the vent. I don't know what but it is nausiating. I have a feeling I won't be getting much sleep, unless I go and sleep on the deck. I am actually afraid to go to sleep, I have no idea what the smell is and I'm sacred I won't wake up. It hasn't set off any detectors - fire or carbon monoxide - but that doesn't mean it's not dangerous...I'm sure it will give me one hell of a headache. Unfortunately the fan does not turn off... there is only on and auto... All I want to do is go to bed. Murphy doesn't seem to concerned about it, you would think it would be worse for him. Of course this would happen when the landlords are away for the weekend. Why does this kinda stuff happen to me... I really don't need this kinda thing this week, I have too many other things to worry about.