You can try snorting a hypertonic warm water salt solution. Sometimes it knocks the bugs down well enough to let your body fight it off naturally.
http://www.med.umich.edu/1libr/OTO/HypertonicSalineNasalIrrigation.pdf
You can also apply it by putting it in a teaspoon and snorting up each nostril while pinching the other one closed.
