dude..rarely will weed be laced with crack or pcp. I mean it happens but more likely it was sprayed with something.

In the DC area I knew that some ghetto weed would be laced with hairspray or some other shit like air freshener..either to cover up the smell to throw off dogs or cops or purposely try and fuck with people.

it sounds like you were having a reaction to some chemical..and NOT incesticides. Most growers don't use that.

Do not buy from that dude again.