I dont know why im doing this.

So the past like 20 times iv smoke weed. i start to over analyse ing  every thing and i dont like it. iv been smoking for about 3 years and this is the first time iv had this happen. will it go away? i break down what people are doing and pick out there personalities. like when someone says something i relate it to a movie or something like if its something nerdy i picture them as a nerd in a movie and its weird. when i say things i think it over about a 1000 time before i say it then after i say it i think about it to much and i think about how people will react and im like paranoid. some one help because i dont drink i onnly smoke and i wanna smoke for as long as possible and i dont wanna stop now. helpp please