ive heard of people getting paranoid from weed but ive never had this happen to me before ...it might be that you were under some stress at the time or it was just a little bit stronger than what you were used to just try smoking a lil bit less if it was laced with something like PCP it would have had an awful chemical odor to it if it was laced with coke there would have been a numbing effect on your lips when you hit the joint and a kind of sizzling sound from when you hit it but most likely it was just some weed that was stonger than what you were used to