Three days ago I smoke some grit weed (Cannabis sprayed in silica dust). I smoked less than 1/8 of an ounce until I noticed it was covered in silica. Since then I have had a slightly irritated throat. I was wondering do I have a much of a chance of developing silicosis in the years to come because of this ? Does the silica have to be inhaled on a regular basis for silicosis to develop or can one high level exposure cause it ? Note I rarely smoke (once a month) therefore this could be the reason for my throat. I am a slight hypercondriac.